sum_interior_angles = 180o x (number_of_sides - 2)
= 180o x (13 - 2)
= 1980o
Chat with our AI personalities
The sum of the interior angles is 360.
The sum of the four interior angles of a trapezoid is 360 degrees.
(number of sides-2)*180 = sum of the interior angles
The sum of the 4 interior angles of a trapezoid add up to 360 degrees.
-- The sum of the four exterior angles is 360 degrees. -- The sum of the four interior angles is also 360 degrees. -- So the sum of all the interior and exterior angles is 720 degrees.