# Mte 181

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You have a heptagon with the following interior angles 125, 130, 175, 105, 165, 25. What's the measurement of the 7th angle and why?

• Mte 181 -

900 - (125 + 130 + 175 + 105 + 165 + 25) = ?

http://www.coolmath.com/reference/polygons-07-heptagons.html

• geometry -

The sum of the interior angles of a polygon with N sides is
180*(N-2) degrees.
A heptagon has N=7 sides, so the sum is 900 degrees.

The seventh angle must be
900-(125 +130 + 175 + 105 + 165 + 25)
= 175 degrees

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