The total for the interior angles depends on the number of sides.
The formula for the total of interior angles of an n-sided polygon is
sum =180(n-2).
This is 180 degrees for triangles, 360 degrees for quadrilaterals, and 540 degrees for pentagons.
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If all of its interior angles are equal then it is a regular polygon
Only when it is a regular polygon that all interior angles are of equal measure
Only if the polygon is "regular".
A 10 sided polygon which is a decagon and its interior angles add up to 1440 degrees.
Sum of interior angles of a polygon = (2n - 4)right angles 1260 = (2n - 4) x 90 1260 = 180n - 360 900 = 180n n = 5, it is a pentagon