7.1 Angles of Polygons Practice

Which of the following is NOT correct?

• n = 5

  Pentagon

• n = 8

  Octagon

• n = 11

  Unidecagon

• n = 6

  Hexagon

Which of the following is NOT correct?

• n = 7

  Heptagon

• n = 9

  Nonagon

• n = 10

  Hexagon

• n = 12

  Dodecagon

Find the sum of the measures of the interior angles of a nonagon.

Find the sum of the measures of the interior angles of a heptagon.

• Nonagon

• 11-gon

• 13-gon

• 15-gon

• Decagon

• 11-gon

• 13-gon

• Dodecagon

Solve for x.

• x = 20

• x = 56

• x = 128

• x = 280

Find the measure of one exterior angle of a regular hexagon.

• 30 degrees

• 60 degrees

• 72 degrees

• 90 degrees

Find the measure of one exterior angle of a regular pentagon.

• 30 degrees

• 60 degrees

• 72 degrees

• 90 degrees

Find the measure of one interior angle of a regular triangle.

• 30 degrees

• 60 degrees

• 72 degrees

• 90 degrees