whi9.4answers

=9.4 Example answers=

Example 1
Angle abc is the central angle. The measure of angle abc is 110° What is the measure of arc AC? arc AC = 110° What is the measure of angle ADC? Angle ADC=½(110°)=55°

Example 2
The measure of arc EG is 80°. The measure of arc IH is 60°. What is the measure of angle EFG?

Angle EFG=½(80°+60°)=70°

What is the measure of angle IFH?

Angle IFH = 70° because it is a vertical angle with angle EFG.

Example 3
The measure of arc JM is 100°. The measure of arc OL is 45°.

What is the measure of angle JKM?

Angle JKM=½(100°– 45°)=½(55°)=27.5°