Diagonals and Interior Angles of a Polygon

What is the name of the segment that connects two nonconsecutive vertices of a polygon?

• Angle

• Diagonal

• Side

• Vertices

What is the formula of finding the number of diagonals in a polygon?

How many diagonals are there in a polygon that has 20 sides?

• 100

• 170

• 200

• 270

Which formula represents how to find the interior angle sum of any polygon?

• (number of sides - 2) x 180

• (number of sides + 2) x 180

• number of sides x 180

• number of sides x 360

Find the value of y in polygon JKLM.

• 25

• 22.5

• 180

• 11.25

It is a line segment that connects two non-consecutive vertices.

• angle

• side

• diagonal

• ray

Determine the number of triangles formed by drawing the diagonals from one vertex in the octagon.

• 6

• 7

• 8

• 10

Find the missing angle.

• 75

• 85

• 100

• 45

Find the measure of angle E.

• 9°

• 97°

• 48°

• 79°

• 50°

Find the value of x.

• 110

• 90

• 130

• 120