Question

Circle P has a circumference of approximately 75 inches. Circle P with radius r is shown. What is the approximate length of the radius, r? Use 3.14 for . Round to the nearest inch.

Answer 1

Answer:

12 inches, I hope this is right! :)

Step-by-step explanation:

circumference = 75 inches

75 / 2 = 35.7

37.5 / π = 11.9366207

Rounded to the nearest inch:

12 inches

Answer 2

Answer:

12 inches

Step-by-step explanation:

The circumference of a circle can be found using the following formula.

c= 2πr

We know that the circumference is 75 inches and we are using 3.14 for pi. Therefore, we can substitute 75 in for c and 3.14 for pi.

75= (2*3.14) r

Multiply 2 and 3.14

75= 6.28* r

We want to find r, or the radius. Therefore, we must get r by itself.

r is being multiplied by 6.28. The inverse of multiplication is division. Divide both sides by 6.28.

75/6.28= 6.28*r/6.28

75/6.28=r

11.9426752=r

Round to the nearest inch. The 9 in the tenth place tells us to round 11 up to a 12.

12= r

r= 12 inches

The approximate length of the radius is 12 inches.