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As shown in the figure, in triangle ABC, angle BAC = 90.0, AD perpendicular BC at point D, AE bisects angle DAC, angle B = 50.0, so the degree of angle DAE is ()
Choices:
A:45°
B:20°
C:30°
D:25° | D |
|
As shown in the figure, angle BAC = 90.0, AE bisects angle DAC, angle B = 50.0, so the degree of angle DAE is ()
Choices:
A:45°
B:20°
C:30°
D:25° | D |
|
As shown in the figure, angle BAC = 90.0, angle B = 50.0, so the degree of angle DAE is ()
Choices:
A:45°
B:20°
C:30°
D:25° | D |
|
As shown in the figure, AE bisects angle DAC, so the degree of angle DAE is ()
Choices:
A:45°
B:20°
C:30°
D:25° | D |
|
Please answer the question shown in the image | D |
|
As shown in the figure, the line l parallel m parallel n, the vertices B and C of the triangle ABC are on the line n and line m, the angle between BC and the line n is 25.0, and angle ACB = 60.0, then the degree of angle a is ()
Choices:
A:25°
B:30°
C:35°
D:45° | C |
|
As shown in the figure, the line l parallel m parallel n, the angle between BC and the line n is 25.0, and angle ACB = 60.0, then the degree of angle a is ()
Choices:
A:25°
B:30°
C:35°
D:45° | C |
|
As shown in the figure, the angle between BC and the line n is 25.0, and angle ACB = 60.0, then the degree of angle a is ()
Choices:
A:25°
B:30°
C:35°
D:45° | C |
|
As shown in the figure, the line l parallel m parallel n, the vertices B and C of the triangle ABC are on the line n and line m, the angle between BC and the line n is 25.0, then the degree of angle a is ()
Choices:
A:25°
B:30°
C:35°
D:45° | C |
|
Please answer the question shown in the image | C |
|
As shown in the figure, it is known that in circle O, the central angle angle AOB = 100.0, then the angle of circumference angle ACB is equal to ().
Choices:
A:130°
B:120°
C:110°
D:100° | A |
|
As shown in the figure, the central angle angle AOB = 100.0, then the angle of circumference angle ACB is equal to ().
Choices:
A:130°
B:120°
C:110°
D:100° | A |
|
As shown in the figure, angle AOB = 100.0, then the angle of circumference angle ACB is equal to ().
Choices:
A:130°
B:120°
C:110°
D:100° | A |
|
As shown in the figure, then the angle of circumference angle ACB is equal to ().
Choices:
A:130°
B:120°
C:110°
D:100° | A |
|
Please answer the question shown in the image | A |
|
As shown in the figure, triangle ABC is inscribed in circle O with radius 1.0, if angle BAC = 60.0, then the length of BC is ()
Choices:
A:2
B:2√{3}
C:√{3}
D:2√{2} | C |
|
As shown in the figure, triangle ABC is inscribed in circle O with radius 1.0, if angle BAC = 60.0, then the length of BC is ()
Choices:
A:2
B:2√{3}
C:√{3}
D:2√{2} | C |
|
As shown in the figure, circle O has a radius 1.0, if angle BAC = 60.0, then the length of BC is ()
Choices:
A:2
B:2√{3}
C:√{3}
D:2√{2} | C |
|
As shown in the figure, then the length of BC is ()
Choices:
A:2
B:2√{3}
C:√{3}
D:2√{2} | C |
|
Please answer the question shown in the image | C |
|
As shown in the figure, the circle O is the circumscribed circle of triangle ABC, and the bisector of angle BAC and angle ABC intersects at point I. Extend AI and it intersects circle O at point D. Connect BD and DC. If the radius of circle O is 8.0, angle BAC = 120.0, then the length of DI is ()
Choices:
A:4√{3}+2
B:4√{3}+3
C:8√{3}+1
D:8√{3} | D |
|
As shown in the figure, the circle O is the circumscribed circle of triangle ABC and the bisector of angle BAC and angle ABC intersects at point I. If the radius of circle O is 8.0, angle BAC = 120.0, then the length of DI is ()
Choices:
A:4√{3}+2
B:4√{3}+3
C:8√{3}+1
D:8√{3} | D |
|
As shown in the figure, if the radius of circle O is 8.0, angle BAC = 120.0, then the length of DI is ()
Choices:
A:4√{3}+2
B:4√{3}+3
C:8√{3}+1
D:8√{3} | D |
|
As shown in the figure, the circle O is the circumscribed circle of triangle ABC and the bisector of angle BAC and angle ABC intersects at point I, then the length of DI is ()
Choices:
A:4√{3}+2
B:4√{3}+3
C:8√{3}+1
D:8√{3} | D |
|
Please answer the question shown in the image | D |
|
As shown in the figure, circle O is the circumscribed circle of triangle ABC. Connect OB and OC, if the radius of circle O is 2.0, angle BAC = 60.0, then the length of BC is ()
Choices:
A:√{3}
B:2√{3}
C:4
D:4√{3} | B |
|
As shown in the figure, circle O is the circumscribed circle of triangle ABC. if the radius of circle O is 2.0, angle BAC = 60.0, then the length of BC is ()
Choices:
A:√{3}
B:2√{3}
C:4
D:4√{3} | B |
|
As shown in the figure, if the radius of circle O is 2.0, angle BAC = 60.0, then the length of BC is ()
Choices:
A:√{3}
B:2√{3}
C:4
D:4√{3} | B |
|
As shown in the figure, circle O is the circumscribed circle of triangle ABC. then the length of BC is ()
Choices:
A:√{3}
B:2√{3}
C:4
D:4√{3} | B |
|
Please answer the question shown in the image | B |
|
As shown in the figure, AB and CD are the two diameters of circle O, chord DE parallel AB, arc DE is the arc of 50.0, then angle BOC is ()
Choices:
A:115°
B:100°
C:80°
D:50° | A |
|
As shown in the figure, chord DE parallel AB, arc DE is the arc of 50.0, then angle BOC is ()
Choices:
A:115°
B:100°
C:80°
D:50° | A |
|
As shown in the figure, arc DE is the arc of 50.0, then angle BOC is ()
Choices:
A:115°
B:100°
C:80°
D:50° | A |
|
As shown in the figure, chord DE parallel AB, then angle BOC is ()
Choices:
A:115°
B:100°
C:80°
D:50° | A |
|
Please answer the question shown in the image | A |
|
As shown in the figure, points A, B, and C are on circle O, angle ABO = 22.0, angle ACO = 42.0, then angle BOC is equal to ()
Choices:
A:128°
B:108°
C:86°
D:64° | A |
|
As shown in the figure, angle ABO = 22.0, angle ACO = 42.0, then angle BOC is equal to ()
Choices:
A:128°
B:108°
C:86°
D:64° | A |
|
As shown in the figure, angle ABO = 22.0, angle ACO = 42.0, then angle BOC is equal to ()
Choices:
A:128°
B:108°
C:86°
D:64° | A |
|
As shown in the figure, then angle BOC is equal to ()
Choices:
A:128°
B:108°
C:86°
D:64° | A |
|
Please answer the question shown in the image | A |
|
As shown in the figure, A, B, C are three points on circle O, angle ACB = 25.0, then the degree of angle BAO is ()
Choices:
A:50°
B:55°
C:60°
D:65° | D |
|
As shown in the figure, angle ACB = 25.0, then the degree of angle BAO is ()
Choices:
A:50°
B:55°
C:60°
D:65° | D |
|
As shown in the figure, angle ACB = 25.0, then the degree of angle BAO is ()
Choices:
A:50°
B:55°
C:60°
D:65° | D |
|
As shown in the figure, then the degree of angle BAO is ()
Choices:
A:50°
B:55°
C:60°
D:65° | D |
|
Please answer the question shown in the image | D |
|
As shown in the figure, it is known that in circle O, angle AOB = 50.0, then the degree of the angle of circumference angle ACB is ()
Choices:
A:50°
B:25°
C:100°
D:30° | C |
|
As shown in the figure, angle AOB = 50.0, then the degree of the angle of circumference angle ACB is ()
Choices:
A:50°
B:25°
C:100°
D:30° | C |
|
As shown in the figure, angle AOB = 50.0, then the degree of the angle of circumference angle ACB is ()
Choices:
A:50°
B:25°
C:100°
D:30° | C |
|
As shown in the figure, then the degree of the angle of circumference angle ACB is ()
Choices:
A:50°
B:25°
C:100°
D:30° | C |
|
Please answer the question shown in the image | C |
|
As shown in the figure, AB is the diameter of circle O, C and D are two points on circle O, angle BAC = 30.0, arc AD = arc CD. Then angle DAC is equal to ()
Choices:
A:70°
B:45°
C:30°
D:25° | B |
|
As shown in the figure, angle BAC = 30.0, arc AD = arc CD. Then angle DAC is equal to ()
Choices:
A:70°
B:45°
C:30°
D:25° | B |
|
As shown in the figure, angle BAC = 30.0, arc AD = arc CD. Then angle DAC is equal to ()
Choices:
A:70°
B:45°
C:30°
D:25° | B |
|
As shown in the figure, arc AD = arc CD. Then angle DAC is equal to ()
Choices:
A:70°
B:45°
C:30°
D:25° | B |
|
Please answer the question shown in the image | B |
|
As shown in the figure, AB is the diameter of circle O, C and D are two points on the circle, angle D = 34.0, then the degree of angle BOC is ()
Choices:
A:102°
B:112°
C:122°
D:132° | B |
|
As shown in the figure, angle D = 34.0, then the degree of angle BOC is ()
Choices:
A:102°
B:112°
C:122°
D:132° | B |
|
As shown in the figure, angle D = 34.0, then the degree of angle BOC is ()
Choices:
A:102°
B:112°
C:122°
D:132° | B |
|
As shown in the figure, then the degree of angle BOC is ()
Choices:
A:102°
B:112°
C:122°
D:132° | B |
|
Please answer the question shown in the image | B |
|
As shown in the figure, points A, B, and C are all on circle O, when angle OBC = 40.0, the degree of angle A is ()
Choices:
A:50°
B:55°
C:60°
D:65° | A |
|
As shown in the figure, when angle OBC = 40.0, the degree of angle A is ()
Choices:
A:50°
B:55°
C:60°
D:65° | A |
|
As shown in the figure, when angle OBC = 40.0, the degree of angle A is ()
Choices:
A:50°
B:55°
C:60°
D:65° | A |
|
As shown in the figure, the degree of angle A is ()
Choices:
A:50°
B:55°
C:60°
D:65° | A |
|
Please answer the question shown in the image | A |
|
As shown in the figure, the diameter AB of circle O is perpendicular to the chord CD, the foot of perpendicular is the point E, angle CAO = 22.5, OC = 6.0, then the length of CD is ()
Choices:
A:6√{2}
B:3√{2}
C:6
D:12 | A |
|
As shown in the figure, angle CAO = 22.5, OC = 6.0, then the length of CD is ()
Choices:
A:6√{2}
B:3√{2}
C:6
D:12 | A |
|
As shown in the figure, angle CAO = 22.5, OC = 6.0, then the length of CD is ()
Choices:
A:6√{2}
B:3√{2}
C:6
D:12 | A |
|
As shown in the figure, then the length of CD is ()
Choices:
A:6√{2}
B:3√{2}
C:6
D:12 | A |
|
Please answer the question shown in the image | A |
|
As shown in the figure, in circle O, chord BC and radius OA intersect at point D. Connect AB and OC. If angle A = 60.0, angle ADC = 90.0, then the degree of angle C is ()
Choices:
A:25°
B:27.5°
C:30°
D:35° | C |
|
As shown in the figure, If angle A = 60.0, angle ADC = 90.0, then the degree of angle C is ()
Choices:
A:25°
B:27.5°
C:30°
D:35° | C |
|
As shown in the figure, If angle A = 60.0, angle ADC = 90.0, then the degree of angle C is ()
Choices:
A:25°
B:27.5°
C:30°
D:35° | C |
|
As shown in the figure, then the degree of angle C is ()
Choices:
A:25°
B:27.5°
C:30°
D:35° | C |
|
Please answer the question shown in the image | C |
|
As shown in the figure, points A, B, and P are three points on circle O, if angle AOB = 40.0, then the degree of angle APB is ()
Choices:
A:80°
B:140°
C:20°
D:50° | C |
|
As shown in the figure, if angle AOB = 40.0, then the degree of angle APB is ()
Choices:
A:80°
B:140°
C:20°
D:50° | C |
|
As shown in the figure, if angle AOB = 40.0, then the degree of angle APB is ()
Choices:
A:80°
B:140°
C:20°
D:50° | C |
|
As shown in the figure, then the degree of angle APB is ()
Choices:
A:80°
B:140°
C:20°
D:50° | C |
|
Please answer the question shown in the image | C |
|
As shown in the figure, AB is the chord of circle O, OC perpendicular AB and it intersects circle O at point C. Connect OA, OB, BC, if angle ABC = 25.0, then the size of angle AOB is ()
Choices:
A:80°
B:90°
C:100°
D:120° | C |
|
As shown in the figure, OC perpendicular AB and it intersects circle O at point C. if angle ABC = 25.0, then the size of angle AOB is ()
Choices:
A:80°
B:90°
C:100°
D:120° | C |
|
As shown in the figure, if angle ABC = 25.0, then the size of angle AOB is ()
Choices:
A:80°
B:90°
C:100°
D:120° | C |
|
As shown in the figure, OC perpendicular AB and it intersects circle O at point C. then the size of angle AOB is ()
Choices:
A:80°
B:90°
C:100°
D:120° | C |
|
Please answer the question shown in the image | C |
|
As shown in the figure, given the angle of circumference angle A = 50.0, then the size of angle OBC is ()
Choices:
A:50°
B:40°
C:130°
D:80° | B |
|
As shown in the figure, given the angle of circumference angle A = 50.0, then the size of angle OBC is ()
Choices:
A:50°
B:40°
C:130°
D:80° | B |
|
As shown in the figure, given the angle of circumference angle A = 50.0, then the size of angle OBC is ()
Choices:
A:50°
B:40°
C:130°
D:80° | B |
|
As shown in the figure, given the angle of circumference, then the size of angle OBC is ()
Choices:
A:50°
B:40°
C:130°
D:80° | B |
|
Please answer the question shown in the image | B |
|
As shown in the figure, AB is the diameter of circle O, CD is the chord of circle O, angle ADC = 26.0, then the degree of angle CAB is ()
Choices:
A:26°
B:74°
C:64°
D:54°
102 | C |
|
As shown in the figure, angle ADC = 26.0, then the degree of angle CAB is ()
Choices:
A:26°
B:74°
C:64°
D:54°
102 | C |
|
As shown in the figure, angle ADC = 26.0, then the degree of angle CAB is ()
Choices:
A:26°
B:74°
C:64°
D:54°
102 | C |
|
As shown in the figure, then the degree of angle CAB is ()
Choices:
A:26°
B:74°
C:64°
D:54°
102 | C |
|
Please answer the question shown in the image | C |
|
As shown in the figure, in circle O, AB is the diameter, CD is the chord, AB perpendicular CD, the foot of perpendicular is the point E. Connect CO and AD, if angle BOC = 30.0, then the degree of angle BAD is ()
Choices:
A:30°
B:25°
C:20°
D:15° | D |
|
As shown in the figure, if angle BOC = 30.0, then the degree of angle BAD is ()
Choices:
A:30°
B:25°
C:20°
D:15° | D |
|
As shown in the figure, if angle BOC = 30.0, then the degree of angle BAD is ()
Choices:
A:30°
B:25°
C:20°
D:15° | D |
|
As shown in the figure, then the degree of angle BAD is ()
Choices:
A:30°
B:25°
C:20°
D:15° | D |
|
Please answer the question shown in the image | D |
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