Radius and Diameter REVIEW

Front

What is the definition of Radius?

Back

A straight line from the center to the circumference of a circle.

Front

What is the definition of Diameter?

Back

A straight line that passes through the center of a circle and touches two points on its circumference.

Front

If the radius of a circle is 18, what is the diameter?

Back

The diameter is 36 (Diameter = 2 x Radius).

Front

What is the relationship between radius and diameter?

Back

The diameter is twice the length of the radius.

Front

If the diameter of a circle is 10 mm, what is the radius?

Back

The radius is 5 mm (Radius = Diameter / 2).

Front

What is a Chord in a circle?

Back

A line segment whose endpoints lie on the circle.

Front

What is a Tangent in relation to a circle?

Back

A line that touches the circle at exactly one point.

Front

If a circle has a radius of 14, what is the circumference? (Use C = 2πr)

Back

The circumference is approximately 87.96 (C = 2 x π x 14).

Front

What is the formula to calculate the area of a circle?

Back

Area = πr².

Front

If the radius of a circle is 32 in, what is the diameter?

Back

The diameter is 64 in.