Introduction to Circles

Question 1

Circle D is shown. Line segment F E goes through point D. Line segment C D is shown. Line segment G H goes from one side of the circle to the other side. Line segment A B is outside of the circle and intersects the circle at point B.

Revolt · Accepted Answer

Line G H

Question 2

In circle O, AC and BD are diameters.

Revolt · Accepted Answer

130°

Question 3

In circle O, and are diameters. The measure of arc DC is 50°.

Revolt · Accepted Answer

220°

Question 4

Circle D is shown. Line segment F E goes through point D. Line segment C D is shown. Line segment G H goes from one side of the circle to the other side. Line segment A B is outside of the circle and intersects the circle at point B.

Revolt · Accepted Answer

Line segment A B

Question 5

Which is true regarding chords and diameters of circles?

Revolt · Accepted Answer

Both chords and diameters have two endpoints on a circle. Diameters must intersect the center of a circle.

Question 6

In circle O, and are diameters. Arc ED measures 17°.

Revolt · Accepted Answer

253°

Question 7

Circle B is shown. Line segments C B, D B, and E B are radii and they form 3 congruent angles.

Revolt · Accepted Answer

a major arc

Question 8

Circle B is shown. Line segments C B, D B, and E B are radii. Angle C B E is 52 degrees and angle E B D is 160 degrees.

Revolt · Accepted Answer

212°

Question 9

Circle D is shown. Line segments G D, F D, and E D are radii. Point H is on the other side of the circle. Angle G D F is 83 degrees and angle F D E is 66 degrees.

Revolt · Accepted Answer

149°

Question 10

Circle X with a radius of 6 units and circle Y with a radius of 2 units are shown.

Revolt · Accepted Answer

Translate the circles so they share a common center point, and dilate circle Y by a scale factor of 3.

Introduction to Circles Answers

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