Question

ABCD is a cyclic quadrilateral such that

∠A = 90°, ∠B = 70°, find ∠C and∠D​

Answer 1

Step-by-step explanation:

A cyclic quadrilateral is a quadrilateral which has all its four vertices lying on a circle.

The sum of two opposite angles in a cyclic quadrilateral is equal to 180 degrees (supplementary angles)

a+c=180

90+c=180.

c=90

b+d=180

70+d=180.

d=110

HOPE THIS HELPS..

Answer 2

Answer:

angle C = 180- angle A( using cyclic quadrilateral property that opposite angles of cyclic quadrilateral are supplementary)

angle C= 180-90

angle C= 90°

again , angle B+ angle D= 180

70° +angle D= 180

angle D= 180-70

angle D= 110