Question

1. radius = ________ diameter = ______ 8) radius = ______ diameter = ______ 9) radius = ______ diameter = ______ 10) radius = ______ diameter = ______ 11) radius = ______ diameter = ______ 12) radius = ______ diameter = ________ printable worksheets @ www.mathworksheets4kids.com

Explanation:

Step1: Recall the relationship between radius and diameter

The diameter $d$ of a circle is twice the radius $r$, i.e., $d = 2r$, and $r=\frac{d}{2}$.

Step2: Solve for problem 7

Given radius $r = 60$ ft. Then diameter $d=2r=2\times60 = 120$ ft.

Step3: Solve for problem 8

Given diameter $d = 108$ yd. Then radius $r=\frac{d}{2}=\frac{108}{2}=54$ yd.

Step4: Solve for problem 9

Given diameter $d = 42$ ft. Then radius $r=\frac{d}{2}=\frac{42}{2}=21$ ft.

Step5: Solve for problem 10

Given diameter $d = 90$ yd. Then radius $r=\frac{d}{2}=\frac{90}{2}=45$ yd.

Step6: Solve for problem 11

Given radius $r = 35$ ft. Then diameter $d=2r=2\times35 = 70$ ft.

Step7: Solve for problem 12

Given diameter $d = 10$ in. Then radius $r=\frac{d}{2}=\frac{10}{2}=5$ in.

Answer:

1. Radius = 60 ft, Diameter = 120 ft
2. Radius = 54 yd, Diameter = 108 yd
3. Radius = 21 ft, Diameter = 42 ft
4. Radius = 45 yd, Diameter = 90 yd
5. Radius = 35 ft, Diameter = 70 ft
6. Radius = 5 in, Diameter = 10 in