Homework - Parts of a Circle

Front

What is the definition of a circle?

Back

A circle is a shape consisting of all points in a plane that are a fixed distance (radius) from a central point (center).

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 a straight line 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 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 chord in a circle?

Back

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

Front

What is an arc in a circle?

Back

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

Front

What is a segment in a circle?

Back

A segment is the area enclosed by a chord and the arc connecting the endpoints of the chord.

Front

What is the center of a circle?

Back

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

Front

How do you calculate the circumference of a circle with a radius of 10 cm?

Back

C = 2π(10 cm) ≈ 62.83 cm.

Front

What is the relationship between diameter and radius?

Back

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