daijawatson daijawatson

13-04-2017
Mathematics

contestada

What is the radius of a circle with a sector area of 7 sq. ft. and an arc whose measure is 70°?

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alkhalidisara alkhalidisara

13-04-2017

the radius is 6 feet.

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apologiabiology apologiabiology

13-04-2017

360 degrees in circle
70/360 of full circle=7square feet
7/36 of full circle=7 squre feet
times both sides by 36/7
full circle=36 square feet

area=pir^2
36=pir^2
divide oth sides by pi (use 3.141592)
11.459=r^2
sqrt both sides
3.3851
about 3.4ft

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