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3 years ago

Help I can't figure this out

Mathematics

1 answer:

Solnce55 [7]3 years ago

3 0

If that were an entire circle, the entire area would be:
area = PI * radius ^2
area = 113.0973355292

Since it is 165 degrees, then the area equals
165 / 360 * 113.0973355292

 equals 51.8362787842 

answer is b

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Step-by-step explanation:

Hello, I can help you with this question

in this case we know the circumference of a circle, and we need to find out the diameter.

let's remember

the radius of a circle can be defined as

$radius=\frac{diameter}{2}\\ or\\diameter=2* radius( equation\ 1)\\$

also

$circumference=2*\pi *radius(equation2)\\$

Step1

replace the value of the circumference of tyler's bike in equation 2 and isolate radius to find radius

$72 inches=2*\pi *radius\\\\radius=\frac{72}{2*\pi } \radius =11.46\ inches$

Step 2

now, replace the value of radius into equation 1 to find diameter

radius=11.46 in

$diameter=2* radius( equation\ 1)\\\\diameter=2*11.46\\diameter=22.92$

so, the diameter is 22.92 inches

I really hope it helps, have a great day.

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