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3 years ago

Circle O has a circumference of 36tt cm. what is length of the radius r

Mathematics

2 answers:

allochka39001 [22]3 years ago

3 0

Answer:

5.73cm

Step-by-step explanation:

Given parameters:

Circumference of the circle = 36cm

Unknown

Length of the radius = ?

Lets represent the radius by r

Solution

The circumference of a circle is the defined as the perimeter of a circle. The formula is given as:

Circumference of a circle = 2πr

Since the unknown is r, we make it the subject of the formula:

r = $\frac{circumference of the circle}{2π}$

r = $\frac{36}{2 x 3.142}$ = $\frac{36}{6.284}$ = 5.73cm

Korolek [52]3 years ago

3 0

Answer:

The radius = 18 cm.

Step-by-step explanation:

I am assuming that is 36π.

If so, then circumference = 2 π r and:

2 π r = 36 π

r = 36π / 2π

r = 18.

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