Niner.
1080 ~ Well, here's how you can solve that: A triangle's interior has a measurement of 180. A square (and all quadrilaterals, which means a shape with four sides) has a measurement of 360. A pentagon has a measurement of 540. A heptagon has a measurement of 720. All you do to get the total angle measurement of more sided shapes (and in your case polygons) that go up from heptagon as well as below it, all you do is add to get the measurement of a larger interior, or subtract for a smaller interior.
The triangle has a larger interior angle than the heptagon because the heptagon has more sides.
A heptagon. It can have a reflex interior angle, a triangle cannot.
heptagon
The sum of the measures of the interior angles of a heptagon is 900 degrees.
An interior angle of a heptagon can have ANY value between 0 and 360 degrees.
The 7 interior angles of a heptagon add up to 900 degrees
The 7 interior angles of a heptagon add up to 900 degrees
If the heptagon is regular the angle measurement for three angles would be approximately 385.7
An interior angle of a convex heptagon can have any value in the range (0, 180) degrees.
The 7 interior angles of an heptagon add up to 900 degrees.
The 7 interior angles of a heptagon add up to 900 degrees