91Ó°ÊÓ

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

triangle: base, \(12 \mathrm{km}\); height \(13 \mathrm{km}\)

What is the measure of each interior angle of a regular heptagon? Round to the nearest tenth.

If \(m \angle N=3 x\) and \(m \angle M=2 x\) and \(\angle M\) and \(\angle N\) are supplementary, what is the measure of each angle?

Find the sum of the measures of the interior angles of each polygon. 18 -gon

Find the sum of the measures of the interior angles of each polygon. 23 -gon

Determine whether each statement is true or false. If false, give a counterexample. If two triangles are congruent, then the perimeters are equal.

Find the measure of an interior angle of each polygon. regular nonagon

The circumference of the Moon is about 6790 miles. What is the distance to the center of the Moon? (THE IMAGES CANNOT COPY)

Find the measure of an interior angle of each polygon. regular pentagon