Radius and Diameter

Front

What is the definition of diameter?

Back

The diameter is the distance across a circle through its center, equal to twice the radius.

Front

How is the radius defined?

Back

The radius is the distance from the center of a circle to any point on its circumference.

Front

What is the relationship between radius and diameter?

Back

The diameter is twice the length of the radius (Diameter = 2 x Radius).

Front

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

Back

The diameter would be 20 cm.

Front

If the diameter of a circle is 50 m, what is the radius?

Back

The radius would be 25 m.

Front

What is the formula for calculating the circumference of a circle using diameter?

Back

Circumference = π x Diameter.

Front

What is the formula for calculating the circumference of a circle using radius?

Back

Circumference = 2 x π x Radius.

Front

What is the area of a circle in terms of radius?

Back

Area = π x (Radius)^2.

Front

What is the area of a circle in terms of diameter?

Back

Area = (π/4) x (Diameter)^2.

Front

How do you convert diameter to radius?

Back

To convert diameter to radius, divide the diameter by 2.