Question

In the diagram below, is circumscribed about quadrilateral ABCD . What is the value of ?

Answer 1

Answer:

C

Step-by-step explanation:

There's a property of cyclis quadrilaterals that say that opposite sides will add up to 180

so we have

$5x+75=180\\\\5x=180-75\\\\5x=105\\\\x=21$

which is option c