Parts of A Circle (p1)

Front

What is the diameter of a circle?

Back

The diameter is a line segment that passes through the center of the circle and connects two points on its circumference. It is twice the length of the radius.

Front

What does the radius of a circle represent?

Back

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

Front

What is the circumference of a circle?

Back

The circumference is the distance around the circle, calculated as C = 2πr, where r is the radius.

Front

What is a sector of a circle?

Back

A sector is a portion of a circle enclosed by two radii and the arc between them.

Front

What is an arc in a circle?

Back

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

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

How do you calculate the area of a circle?

Back

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

Front

What is the relationship between the diameter and radius?

Back

The diameter is twice the length of the radius (d = 2r).

Front

What is the formula for the circumference of a circle?

Back

The formula for the circumference is C = πd or C = 2πr.

Front

What is the definition of a chord in a circle?

Back

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