Applying properties of polygons

The exterior angles always have a sum of

• 180

• 360

Solve for the missing angle measures.

If an exterior angle of a regular polygon measures 40°, how many sides does the polygon have?

• 9 sides
• 18 sides
• 4 sides
• 13 sides

What is the measure of each exterior angle of a regular 30-gon?

• 15

• 12

• 19

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

What do the exterior angles of a triangle have a sum of?

• 180
• 360
• 90
• 45

What is the measure of each exterior angle of a regular octagon?

• 30 degrees

• 75 degrees

• 45 degrees

• 60 degrees

What is the degree of one exterior angle of a regular decagon(10 sides)?

• 36°

• 360°

• 10°

• 72°

Which of the following is a possible set of measures for the exterior angles of a triangle?

**Triangles must add up to  $180\degree$ . Exterior angles and the interior angles of triangles are equal to  $180\degree$ . Find the answer choice that these exterior angles give you the interior angles that 

• 60, 120, 180
  

• 75, 85, 200

• 80, 125, 155

• 120, 130, 140

Find the exterior angle on a regular polygon with 10 sides...

• 36^o

• 144^o

• rooster

• 150^o