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Elementary Geometry for College St...

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

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BuyFindarrow_forward

Elementary Geometry for College St...

6th Edition
Daniel C. Alexander + 1 other
ISBN: 9781285195698
Textbook Problem
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If the area of 1200 sector is 50 cm2, what is the area of the entire circle?

Chapter 8.5, Problem 7E, If the area of 1200 sector is 50 cm2, what is the area of the entire circle?

To determine

To find:

The area of entire circle.

Explanation

Definition:

Arc Measure:

In a circle, the degree measure of an arc is equal to the measure of central angle that intercepts the arc.

Formula:

If r is the radius of the circle, the area A of a sector whose arc has degree measure m is given by

A=m360×πr2

Calculation:

The measure of central angle is given as 1200.

As per the definition of measure of an arc, the degree measure of an arc is equal to the central angle intercepted by it.

Thus, the degree measure of arc AB^ = 1200. Hence, m=1200

The formula for area A of sector is:A=m360×πr2.

Area A of sector is given as 50 cm2

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