Quadrilateral opqr is inscribed inside a circle as shown below. write a proof showing that angle o and q are supplementary

In the circle, we can see that angle O and angle Q are both inscribed angles which intercepts an arc. Angle O intercepts arc RQP while angle Q intercepts arc ROP. The measure of each angle is measured to be one half of its intercepted arc, that is: 

m ∠ O = m (arc PQR/2)
m ∠ Q = m (arc POR/2)

However we can also see that arcs RQP and ROP together make up the entire circle which has 360 degrees.

arc PQR + arc POR = 360°

therefore dividing both sides by 2:
arc PQR/2 + arc POR/2 = 180°

Then:
m ∠ O + m ∠ Q =  m (arc PQR/2) + m (arc POR/2) = 180°

∠ O + ∠ Q = 180° are supplementary

a.

step-by-step explanation:

step 1 distribute 2 to every term in the parentheses

step 2 add 10 on both sides of the equal sign

step-by-step explanation :

we know that

the measurement of the outer angle is the semi-difference of the arcs which comprises

in this problem

m< xzy is the outer angle

substitute the values

the measure of angle xoy is equal to

> by central angle

substitute the value