Parts Of A Circle

Front

What is the area of a circle?

Back

The area of a circle is the space contained within its circumference, calculated using the formula A = πr², where r is the radius.

Front

What is the circumference of a circle?

Back

The circumference of a circle is the distance around the circle, calculated using the formula C = 2πr or C = πd, where r is the radius and d is the diameter.

Front

What is the radius of a circle?

Back

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

Front

What is a chord in a circle?

Back

A chord is a line segment with both endpoints on the circle.

Front

What is a diameter in relation to a chord?

Back

A diameter is a special type of chord that passes through the center of the circle.

Front

What is a quarter-circle?

Back

A quarter-circle is one-fourth of a circle, representing a 90-degree arc.

Front

What is an arc in a circle?

Back

An arc is a part of the circumference of a circle.

Front

What is the relationship between radius and diameter?

Back

The radius is half the length of the diameter.

Front

What is the formula for the area of a circle?

Back

A = πr², where A is the area and r is the radius.