WHAT'S UP

It is a line segment that connects any two points on the circle.

• chord

• secant

• tangent

• sector

It is a part of a circle enclosed by two radii and an arc.

• chord

• secant

• tangent

• sector

It is an angle whose vertices are on the circle.

• obtuse angle

• acute angle

• inscribed angle

• central angle

It is an angle whose common vertex is at the center of the circle.

• obtuse angle

• acute angle

• inscribed angle

• central angle

It is an arc greater than the semicircle.

• minor arc

• major arc

• semicircle

• intercepted arc

It is an arc whose endpoints are vertices of angles in a circle.

• minor arc

• major arc

• semicircle

• intercepted arc

II. Refer to the illustration to find the measure of the given parts and lines of a circle. A. Given OB with diameter AC, find: 7-9. What is the measure of arc DC?

• 90°

• 180°

• 60°

• 120°

II. Refer to the illustration to find the measure of the given parts and lines of a circle. A. Given OB with diameter AC, find: 10-12. the measure of ∠ACD.
What is the measure of ∠ACD?

• 90°

• 45°

• 60°

• 120°

Given that AD is tangent to OB at A, what is the measure of ∠CAD?

• 90°

• 45°

• 60°

• 30°

Given the diagram of Circle B, what is the measure of ∠CDB if the measure of ∠ABD is 30°?

• The measure of ∠CDB is 60°.

• The measure of ∠CDB is 30°.

• The measure of ∠CDB is 45°.

• The measure of ∠CDB is 90°.