Question

A radius is a0 the diameter

Answer 1

half

you write half in the blank

Answer 2

Hence, A radius is half the diameter.

Explanation:

The question is asked as:

A radius is
`a_0` the diameter.

i.e. what is the value of the constant
`a_0` such that the radius and the diameter are related to each other.

We know that:

The Radius is the length of the line through the center that touches a point on the edge of the circle.

The diameter is the length of the line through the center that touches two points on the edge of the circle.

Hence Radius is half the diameter.

so the value of
`a_0=(1)/(2)`

( Or we can say Diameter is twice the radius of the circle.

`d=2r\\\\r=(1)/(2)d`

where d denotes the diameter of the circle and r denotes the radius of the circle ).