Circle Basics

Front

What is a radius of a circle?

Back

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

Front

What is a diameter of a circle?

Back

A diameter is a line segment that passes through the center of the circle and has its endpoints on the circle. It is twice the length of the radius.

Front

Define a chord in a circle.

Back

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

Front

What is the difference between a major arc and a minor arc?

Back

A minor arc is smaller than a semicircle, while a major arc is larger than a semicircle.

Front

What is a semicircle?

Back

A semicircle is an arc that measures exactly 180 degrees, representing half of a circle.

Front

If segment TE is a diameter, what is the measure of arc TRE?

Back

The measure of arc TRE is 180°, and it is a semicircle.

Front

If segment RK is a diameter and m∠TSR = 42°, what is the measure of arc TRK?

Back

The measure of arc TRK is 222°, and it is a major arc.

Front

Given that segment TR is a diameter, what is the measure of arc ATR?

Back

The measure of arc ATR is 270°, and it is a major arc.

Front

Which of the following is not a chord: PS, XY, RT, TR?

Back

The segment PS is not a chord.

Front

What is the relationship between the diameter and the radius?

Back

The diameter is twice the length of the radius.