Question

Find the radius of a circle whose circumference are 22 cm , 17.6 cm ( These are different questions ) PLEASE EXPLAIN STEP BY STEP AND A KIND REQUEST THAT NO IRRELEVANT ANSWERS SHOULD BE POSTED, THEY WILL BE SIMPLY REPORTED​

Answer 1

Answer:

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1.  3.5

2.  2.8

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Step-by-step explanation:

1. so yeah,

2πr = 22  

(formula of a perimeter of a circle aka. circumference)

2πr = 22

2*3.14r = 22

6.28r = 22

r = 22/6.28

r = 3.5 (approx.)

2. 2πr = 17.6

6.28r = 17.6

r = 17.6/6.28

r = 2.8(approx.) full answer is "2.8025477707006"

Answer 2

We have to find radius for 22cm and 17.6 cm.              

For 22cm = Circumference = 22 = 2pi * radius        <pls note that * means into>

                                                22 = 2*22/7*x

                                        22/2=11 = 22/7*x

                      11*7/22 = 7/2 = 3.5 = x

The radius is 3.5 cm.

For 17.6cm = Circumference = 17.6 = 2*pi*r

                                                  17.6 = 2*22/7*x

                                                  17.6 = 44/7*x

                                17.6*7/44 = 2.8 = x    

The radius is 2.8 cm.

This is the answer.

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