Answer:
See below ~
Step-by-step explanation:
Rule :
Opposing angles in a cyclic quadrilateral are supplementary, which means they add up to 180°.
Q12
- 4x + 9 + 3x + 3 = 180
- 7x + 12 = 180
- 7x = 168
- x = 24
Q13
- 3x + 2 + 3x - 32 = 180
- 6x - 30 = 180
- 6x = 210
- x = 35
