In the given figure, ABCD is a cyclic quadrilateral in which AB ∥ DC and ∠BAD = 100°. Then ∠ABC = ?
A. 80°
B. 100°
C. 50°
D. 40°
Answer:B
In the given figure, ABCD is a cyclic quadrilateral in which AB ∥ DC and ∠BAD = 100°. Then ∠ABC = ?
A. 80° B. 100° C. 50° D. 40°