Radius and Diameter

Front

What is the radius of a circle?

Back

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

Front

What is the diameter of a circle?

Back

The diameter of a circle is a straight line segment that passes through the center of the circle and whose endpoints lie on the circumference. It is twice the length of the radius.

Front

If the diameter of a circle is 70 m, what is the radius?

Back

35 m

Front

If the radius of a circle is 24 m, what is the diameter?

Back

48 m

Front

What is the relationship between radius and diameter?

Back

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

Front

What is the formula to calculate the diameter from the radius?

Back

Diameter = 2 x Radius.

Front

What is the formula to calculate the radius from the diameter?

Back

Radius = Diameter / 2.

Front

If a circle has a radius of 47 cm, what is its diameter?

Back

94 cm

Front

What is the circumference of a circle?

Back

The circumference is the distance around the circle, calculated as Circumference = π x Diameter.

Front

What is the area of a circle?

Back

The area of a circle is calculated using the formula Area = π x (Radius)^2.