Polygon Sum Theorem Exterior Angle Theorem and Triangles

If 2 of the angles of a triangle are 30 and 70 degrees, the third angle measures...

• 80

• 100

• 60

• 90

What is the third angle of a triangle if the 1st angle is 50, and the 2nd angle is 70?

• 50

• 60

• 70

• 80

Find the measure of ONE exterior angle of a regular decagon.

• 36

• 10

• 18

• 40

The sum of the interior angles of a polygon is __________________ where n is the number of sides.

• (n - 2)180

• (n - 1)180

• 360

• (n - 3)(180)

Find the measure of one interior angle in regular 25-gon. Round your answer to the nearest tenth if necessary.

• 164.3⁰

• 167.1⁰

• 165.6⁰

• 166.7⁰

Find the value of x.

• 540⁰

• 121⁰

• 134⁰

• 360⁰

• The measure of the largest interior angle

• The number of sides of the polygon

• Nothing

• The number of triangles that compose the polygon

Find the sum of the angle measures in this polygon.

• 1080

• 540

• 1440

• 720

What is the sum of exterior angles of a pentagon?

• 180

• 360

• 540

• 760

What is the formula to find one exterior angle in a regular polygon?

• 360/n

• (n-2)180

• it's always 360^o

• 180/n

• ((n-2)180)/n