Measure of Arcs and Angles

Front

What is a diameter?

Back

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

Front

What is a major arc?

Back

A major arc is an arc that measures greater than 180 degrees.

Front

What is the measure of a full circle in degrees?

Back

A full circle measures 360 degrees.

Front

What is the relationship between a radius and a diameter?

Back

The diameter is twice the length of the radius.

Front

How do you find the measure of an arc in a circle?

Back

The measure of an arc can be found using the central angle that subtends the arc.

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 the formula for the circumference of a circle?

Back

The circumference C of a circle is given by the formula C = πd, where d is the diameter.

Front

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

Back

A minor arc measures less than 180 degrees, while a major arc measures more than 180 degrees.

Front

What does it mean for two circles to be similar?

Back

Two circles are similar if they have the same shape but may differ in size.

Front

What is the scale factor in dilation?

Back

The scale factor is the ratio of the lengths of corresponding sides of similar figures.