Question

ABCD is a cyclic quadrilateral in which AB || CD. If ZD=70°, find all the remaining angles. ​

Answer 1

Answer:

Since ab II cd, it can either form an isosceles trapezium or a parallelogram. In these, opposite pairs of angles are equal. Therefore, the remaining angles are: 110, 70, 110, 70 degrees.

Answer 2

Answer:

Since ab II cd, it can either form an isosceles trapezium or a parallelogram. In these, opposite pairs of angles are equal. Therefore, the remaining angles are: 110, 70, 110, 70 degrees