SOMEONE PLEASE HELP!! In circle P, diameter QS measures 20 centimeters. What is the approximate length of arc QR? Round to the nearest tenth of a centimeter.

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asked May 23, 2018 225k views

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SOMEONE PLEASE HELP!!

In circle P, diameter QS measures 20 centimeters. What is the approximate length of arc QR? Round to the nearest tenth of a centimeter.

SOMEONE PLEASE HELP!! In circle P, diameter QS measures 20 centimeters. What is the-example-1

Mathematics
high-school

Micael Sousa asked

by Micael Sousa

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2 Answers

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Answer:19.9

Explanation:

Jozef Chocholacek answered May 24, 2018

by Jozef Chocholacek

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3 votes

First you need the size of an angle QPR = B = 180° - 123°
Lenght of QP = 10cm
QR = x
QP = r
x² = r² + r² - 2r² × cosB

Rodgdor answered May 29, 2018

by Rodgdor

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