U8D3 HW 24-25

Front

What is the measure of angle A if it is an acute angle?

Back

An acute angle measures less than 90°.

Front

What is the measure of angle A if it is an obtuse angle?

Back

An obtuse angle measures more than 90° but less than 180°.

Front

What is the measure of a straight angle?

Back

A straight angle measures exactly 180°.

Front

What is the measure of a reflex angle?

Back

A reflex angle measures more than 180° but less than 360°.

Front

Define a major arc in a circle.

Back

A major arc is an arc that measures more than 180°.

Front

Define a minor arc in a circle.

Back

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

Front

What is a semi-circle?

Back

A semi-circle is an arc that measures exactly 180°.

Front

What is a central angle?

Back

A central angle is an angle whose vertex is at the center of the circle and whose sides are radii.

Front

How do you find the length of an arc?

Back

The length of an arc can be found using the formula: (θ/360) * 2πr, where θ is the central angle in degrees and r is the radius.

Front

What is the relationship between the angles in a triangle?

Back

The sum of the interior angles in a triangle is always 180°.