   Chapter 8.CT, Problem 11CT ### Elementary Geometry for College St...

6th Edition
Daniel C. Alexander + 1 other
ISBN: 9781285195698

#### Solutions

Chapter
Section ### Elementary Geometry for College St...

6th Edition
Daniel C. Alexander + 1 other
ISBN: 9781285195698
Textbook Problem
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# Where , find the approximate length of A C ^ . l A C ^ ≈                                   _ To determine

To find:

The approximate length of AC^.

Explanation

Given:

If π227 and the figure given below.

Theorem:

1. The circumference C of a circle is given by the formula, C=πd or C=2πr where d is the diameter and r is the radius of the circle.

2. In a circle whose circumference is C, the length l of an arc whose degree measure is m is given by l=m360·C.

From the given, π227.

Form the figure, m=45, and r=7 in.

To find the circumference of the circle, substitute r=7 in C=2πr

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