Arcs & Chords

Front

What is a chord in a circle?

Back

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

Front

What is the definition of a minor arc?

Back

A minor arc is an arc that measures less than 180 degrees.

Front

If chord AB = 9, what is the length of chord CD if they are equal?

Back

CD = 9.

Front

What is the relationship between the diameter and a chord?

Back

A diameter is the longest chord in a circle.

Front

How do you find the length of a chord given the radius and the angle subtended at the center?

Back

Use the formula: Length of chord = 2 * r * sin(θ/2), where r is the radius and θ is the angle in radians.

Front

What is the measure of a semicircle?

Back

A semicircle measures exactly 180 degrees.

Front

Name a minor arc in circle E with points A and B.

Back

AB is a minor arc.

Front

What is the formula for the circumference of a circle?

Back

Circumference = 2 * π * r, where r is the radius.

Front

If the measure of arc AB is 120 degrees, what type of arc is it?

Back

AB is a minor arc.

Front

What is the relationship between the central angle and the arc it subtends?

Back

The measure of the arc is equal to the measure of the central angle.