A convex heptagon has interior angles that measure 120, 115, 135, 95, 155, and 125 degrees. What is the measure of the seventh interior angle?

Question

anonymous · Answer

The sum of the interior angles of a convex polygon is always$$(n-2)180 $$degrees.  Your heptagon should have a complete angle sum of (7-2)*180=900.  All you have to do is subtract the six angles you have to get your seventh.  Should be 155.

anonymous · Answer

No what you do is add up all the numbers and then do 365degree's subtacted ny the sum of all the numbers and it gives you the seventh degree.(: your welcome!!! hey i'm pretty smart cause i'm only 11.