Circumference and Arc Length

Question 1

Circle Q has a circumference of approximately 50 centimeters.

Revolt · Accepted Answer

15.9 centimeters

Question 2

Two circles are shown in the diagram.Since all circles are similar, a proportion can be set up using the circumference and diameter of each circle. Substitute the values d1 = 1, C1 = π, and d2 = 2r into the proportion.Which shows how to correctly solve for C2, the circumference of any circle with radius r?

Revolt · Accepted Answer

Because

Question 3

In circle M, diameters JL and HK each measure 16 centimeters.

Revolt · Accepted Answer

3.5 cm

Question 4

Consider circle T with radius 24 in. and θ = radians.

Revolt · Accepted Answer

20π in.

Question 5

An arc on a circle measures 295°. The measure of the central angle, in radians, is within which range?

Revolt · Accepted Answer

to 2π radians

Question 6

Minor arc KL measures 135°.

Revolt · Accepted Answer

radians

Question 7

Circle O has a circumference of approximately 44 in.

Revolt · Accepted Answer

14 in.

Question 8

Two similar circles are shown. The circumference of the larger circle, with radius OB, is 3 times the circumference of the smaller circle, with radius OA.

Revolt · Accepted Answer

6πx units

Question 9

Arc CD is of the circumference of a circle. What is the radian measure of the central angle?

Revolt · Accepted Answer

radians

Question 10

In the diagram below, Θ is measured in radians. Which equation represents the relationship between the radius, r, and arc length, s?

Revolt · Accepted Answer

s = Θ · r

Circumference and Arc Length Answers

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