Circle Geometry Concepts

Front

What is a semicircle?

Back

A semicircle is half of a circle, formed by a diameter and the arc connecting its endpoints.

Front

What is the area of a circle?

Back

The area of a circle is the space inside the circle, calculated using the formula A = πr², where r is the radius.

Front

What is an arc in a circle?

Back

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

Front

What is an inscribed angle?

Back

An inscribed angle is an angle formed by two chords in a circle that meet at a point on the circle.

Front

What is a chord?

Back

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

Front

What is the diameter of a circle?

Back

The diameter is a chord that passes through the center of the circle, and it is twice the length of the radius.

Front

What is the radius of a circle?

Back

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

Front

What is the circumference of a circle?

Back

The circumference is the distance around the circle, calculated using the formula C = 2πr.

Front

What is a central angle?

Back

A central angle is an angle whose vertex is at the center of the circle and whose sides are radii.

Front

What is a minor arc?

Back

A minor arc is an arc that is smaller than a semicircle.