Question

Which of the following correctly relates the measures of the diameter(d) and radius(r) of a circle?

8
d=r/2
r=2d
r=d/2
d=2/r

Answer 1

`r= (d)/(2)`

Explanation:

find the expression that relates the measures of the diameter(d) and radius(r)

Diameter of the circle is the line that passes through the center of the circle and endpoints are on the circle

Radius is the line that starts at the center of the circle and ends on the circle

diameter is twice the radius

Diameter = 2* radius

Radius is half of the diameter

Radius = diameter divide by 2

`r= (d)/(2)`

Answer 2

The radius is half the diameter, then r = d/2.

You can also write d = 2r but that option is not included.

Then the answer is r = d/2.