If one angle of a triangle is equal to the sum of the other two angles, then the triangle is
A. a right triangle
B. an isosceles triangle
C. an equilateral triangle
D. an obtuse triangle
Answer:A
If one angle of a triangle is equal to the sum of the other two angles, then the triangle is
A. a right triangle B. an isosceles triangle C. an equilateral triangle D. an obtuse triangle