Parts of a Circle

Front

What is the definition of a diameter in a circle?

Back

A diameter is a line segment that passes through the center of a circle, connecting two points on the circle.

Front

How is the diameter related to the radius in a circle?

Back

The diameter is twice as long as the radius.

Front

What is the center of a circle?

Back

The center of a circle is the point that is equidistant from all points on the circle.

Front

If the diameter of a circle is 40 m, what is the radius?

Back

The radius is 20 m.

Front

What is the radius of a circle?

Back

The radius is a line segment from the center of the circle to any point on the circle.

Front

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

Back

The circumference (C) can be calculated using the formula C = πd, where d is the diameter.

Front

What is the relationship between the radius and the circumference of a circle?

Back

The circumference can also be calculated using the formula C = 2πr, where r is the radius.

Front

What is the area of a circle?

Back

The area (A) of a circle can be calculated using the formula A = πr², where r is the radius.

Front

What is the relationship between the diameter and the area of a circle?

Back

The area can be expressed in terms of the diameter using the formula A = (π/4)d².

Front

What is a chord in a circle?

Back

A chord is a line segment whose endpoints lie on the circle.