Question

Use the image of the circle to identify the length of the radius, diameter, and circumference. Leave all answers in terms of π when necessary.

Answer 1

Diameter is 15 unit , radius is 7.5 units and circumference is
`15\pi` units.

Explanation:

Given a circle with diameter = 15 units.

We need to identity the length of the radius, diameter, and circumference of the given circle.

Radius of circle is a line segment that is drawn from center to the perimeter of the circle.

Radius is half of diameter.

Thus, Radius =
`(1)/(2)\cdot 15=7.5`

Thus, radius of given circle is 7.5 units.

Circumference is the length of the boundary or perimeter.

Circumference of circle =
`2\pi r`

Substitute the values,

Circumference of circle =
`2\pi (7.5)=15\pi`

Thus, circumference of given circle is
`15\pi` units

Thus, diameter is 15 unit , radius is 7.5 units and circumference is
`15\pi` units