Introduction to Circles

Question 1

Which circle C shows a chord that is not a diameter?

Revolt · Accepted Answer

D: [Image: Circle C is shown. A line goes from one point on t...]

Question 2

Identify the parts relating to A. What is ? What is ? What is ? What is AC?

Revolt · Accepted Answer

C: secant

Question 3

Circle A has a radius of 6. Which circles are congruent to circle A? Check all that apply.

Revolt · Accepted Answer

B: circle E; C: circle F

Question 4

Complete the statements about circle Z. A central angle, such as angle of circle Z, is an angle whose vertex is and whose sides are radii of the circle. Angle is not a central angle of circle Z. The degree measure of an arc is the degree measure of the central angle that intercepts it. The measure of is degrees.

Revolt · Accepted Answer

B: UZV

Question 5

Which statements are correct? Check all that apply.A chord is sometimes a radius.A diameter is always a chord.A tangent is never a secant.A chord can be longer than a diameter of the same circle.A chord can be shorter than a radius of the same circle.A radius is always congruent to another radius of the same circle.

Revolt · Accepted Answer

B: A diameter is always a chord.; C: A tangent is never a secant.; E: A chord can be shorter than a radius of the same circle.; F: A radius is always congruent to another radius of the same circle.

Question 6

major arc✔ minor arcsemicircle

Revolt · Accepted Answer

B: minor arc

Question 7

What is m?

Revolt · Accepted Answer

D: 231°

Question 8

Determine the values. The value of x is . The measure of is degrees. The measure of is degrees.

Revolt · Accepted Answer

Part 1: 5; Part 2: 58; Part 3: 55

Question 9

Which would prove that the circles are similar? Dilate the smaller circle by a factor of . If the circles were not concentric, what additional step would be needed to prove they are similar? one of the circles so that the circles have the same center.

Revolt · Accepted Answer

B: 11/5

Question 10

Question 10

Revolt · Accepted Answer

D: tangent

Introduction to Circles Answers

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