Question

In cyclic quadrilateral ABCD angle A - angle C = 20 then find angle A​

Answer 1

In cyclic quadrilateral opposite angles are supplementary.

So angle a + angle c= 180

angle a - angle c= 20

2 angle a= 200

angle a= 100

angle c= 80

Answer 2

Answer:

hi,

Step-by-step explanation:

angleA + angle C = 180 (property of cyclic quadrilateral)

given, angleA - angleC = 20

by solving the above two equations for two unknowns A and C

A = 100 , B = 80