Circles Flashcardzizz

Front

What is a major arc in a circle?

Back

A major arc is an arc that measures more than 180 degrees. For example, arc JLH is a major arc.

Front

If the measure of arc ABC = 210°, what is the measure of ∠AOC?

Back

The measure of ∠AOC is 150°.

Front

What is a chord in a circle?

Back

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

Front

What is a tangent in relation to a circle?

Back

A tangent is a line that touches the circle at exactly one point.

Front

What is a minor arc in a circle?

Back

A minor arc is an arc that measures less than 180 degrees. For example, arc JL is a minor arc.

Front

What is the difference between a chord and a diameter?

Back

A diameter is a special type of chord that passes through the center of the circle and is the longest chord.

Front

How do you classify arcs in a circle?

Back

Arcs can be classified as minor arcs (less than 180°), major arcs (more than 180°), or semicircles (exactly 180°).

Front

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

Back

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

Front

What is the formula for the circumference of a circle?

Back

The circumference C of a circle is given by the formula C = 2πr, where r is the radius.

Front

What is the formula for the area of a circle?

Back

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