Question

A dartboard has a diameter of 4 inches. What are its radius and circumference? Round to

the nearest hundredth. Use 3.14 for it.

The radius is inches.

The circumference is approximately

inches.

Answer 1

Answer: The radius is 2 inches.

The circumference is approximately 12.56 inches.

Explanation:

Given : The diameter of a dartboard = 4 inches

Since , radius is half of the diameter.

Therefore, radius of dartboard = (diameter) ÷ 2

= (4 inches ) ÷ 2 = 2 inches

Also, Formula for circumference :
`C=2\pi r`, where r is radius.

Now , Circumference of dartboard =
`2(3.14)(2)=12.56\text{ inches}`

Hence, The radius is 2 inches.

The circumference is approximately 12.56 inches.