Example 1 Use Inscribed Angles to Find Measures
b. mPO
Find each measure.
ዘረP
m2P = MN
= {(70) or 35
mPO-2m2N
= 2(56) or 112
Guided Practice
1A. mCF
13. mZC
Two inscribed angles that intercept the same arc of a circle are related.
Theorem 10.7

Aline is perpendicular to another line m2= (-1/m1), where m1 is the slope of the original line and m2 is the slope of the perpendicular line. which of the following equations represents the line that passes through the point (-2,1) and is perpendicular to the line below?