Ch. 5 Lessons 1-3 REVIEW

Front

Which of the following statements is true? ∠D = ∠B, AC = DA, the diagonals are perpendicular, ∠C + ∠B = 180

Back

∠C + ∠B = 180 (This is a property of supplementary angles.)

Front

What is the sum of interior angles for a pentagon?

Back

The sum of interior angles for a pentagon is 540 degrees.

Front

If an exterior angle of a regular polygon has a measure of 36 degrees, how many sides does it have?

Back

A regular polygon with an exterior angle of 36 degrees has 10 sides.

Front

Find the measure of ∠1 if it is supplementary to 79°.

Back

∠1 = 101° (because 180° - 79° = 101°).

Front

What is the measure of a single interior angle for a regular octagon?

Back

The measure of a single interior angle for a regular octagon is 135°.

Front

Define supplementary angles.

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

What is the formula to find the sum of interior angles of a polygon?

Back

The sum of interior angles of a polygon with n sides is (n-2) × 180 degrees.

Front

How do you calculate the measure of an exterior angle of a regular polygon?

Back

The measure of an exterior angle of a regular polygon is 360° divided by the number of sides.

Front

What is the relationship between interior and exterior angles of a polygon?

Back

Interior and exterior angles are supplementary; they add up to 180 degrees.

Front

What is the sum of the interior angles of a triangle?

Back

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