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

What is the definition of radius?

Back

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

Front

If the radius of a circle is 5, what is the diameter?

Back

10 (Diameter = 2 x Radius)

Front

If the diameter of a circle is 14, what is the radius?

Back

7 (Radius = Diameter / 2)

Front

What is the relationship between radius and diameter?

Back

The diameter is always twice the length of the radius.

Front

What shape is defined by having all points equidistant from a center point?

Back

Circle.

Front

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

Back

Circumference = π x Diameter.

Front

What is the formula for calculating the area of a circle?

Back

Area = π x Radius².

Front

If a circle has a diameter of 20, what is its radius?

Back

10 (Radius = Diameter / 2)

Front

What is the diameter of a circle with a radius of 3.5?

Back

7 (Diameter = 2 x Radius)