The sum of the four interior angles is 360 degrees.
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False, the sum of the angles in a parallelogram is 360 degrees.
The sum of the measures of the interior angles of a heptagon is 900 degrees.
50°, 130°, and 50° are.
Two angles with a sum of 90 are called complimentary angles.
It depends on what the measures relate to: lengths of sides, interior angles, exterior angles, ...