1. The circumference of a circle is 58n cm. Find the diameter (D), the radius (r), and the length of an arc (a) with measure of 140°. A. D: 116 cm; r: 29 cm; a: 160n cm B. D: 58 cm; r: 29 cm; a: 22.6 cm C. D: 29 cm; r: 58 cm; a: 11.3r cm D. D: 58 cm; r: 116 cm; a: 11.3n cm

1. The circumference of a circle is 58n cm. Find the diameter (D), the radius (r), and the length of an arc (a) with measure of 140°. A. D: 116 cm; r: 29 cm; a: 160n cm B. D: 58 cm; r: 29 cm; a: 22.6 cm C. D: 29 cm; r: 58 cm; a: 11.3r cm D. D: 58 cm; r: 116 cm; a: 11.3n cm

Elementary Geometry For College Students, 7e

7th Edition

ISBN:9781337614085

Author:Alexander, Daniel C.; Koeberlein, Geralyn M.

Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.

ChapterP: Preliminary Concepts

SectionP.CT: Test

Problem 1CT

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Concept explainers

Ratios

A ratio is a comparison between two numbers of the same kind. It represents how many times one number contains another. It also represents how small or large one number is compared to the other.

Trigonometric Ratios

Trigonometric ratios give values of trigonometric functions. It always deals with triangles that have one angle measuring 90 degrees. These triangles are right-angled. We take the ratio of sides of these triangles.

Question

1. The circumference of a circle is 58n cm. Find the diameter (D), the radius (r), and the
length of an arc (a) with measure of 140°.
A. D: 116 cm; r: 29 cm; a: 160n cm
B. D: 58 cm; r: 29 cm; a: 22.6 cm
C. D: 29 cm; r: 58 cm; a: 11.3r cm
D. D: 58 cm; r: 116 cm; a: 11.3n cm

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