Discovering Geometry Chapter 5 Test Review HGHS

Complete each statement.

1. The number of triangles formed in an octagon when all the diagonals from one

vertex are drawn is ________________.

2. The sum of the measures of the n interior angles of an n-gon is _____________.

3. The sum of the measures of the exterior angles of a 30-gon is _______________.

4. The measure of one angle in a regular decagon is ________________.

5. If the measure of one exterior angle of a regular polygon is 30°, then the polygon

has ________________ sides.

Discovering Geometry Chapter 5 Test Review HGHS

How many triangles are formed by drawing diagonals from one vertex in the polygon? What is the sum of the measures of the angles in the polygon?

180(n-2) = sum of the measures of the interior angles.

(n-2) = number of triangles, where n = number of sides

(10 - 2) = 8

180(10-2) = 1440

180(n-2) = sum of the measures of the interior angles.

(n-2) = number of triangles, where n = number of sides

(12 - 2) = 10

180(12-2) = 1800

Discovering Geometry Chapter 5 Test Review HGHS

Discovering Geometry Chapter 5 Test Review HGHS

Discovering Geometry Chapter 5 Test Review HGHS

Discovering Geometry Chapter 5 Test Review HGHS

Discovering Geometry Chapter 5 Test Review HGHS

Discovering Geometry Chapter 5 Test Review HGHS

Discovering Geometry Chapter 5 Test Review HGHS

Discovering Geometry Chapter 5 Test Review HGHS

Discovering Geometry Chapter 5 Test Review HGHS

Discovering Geometry Chapter 5 Test Review HGHS

Discovering Geometry Chapter 5 Test Review HGHS