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Q: Do all quadrangles sum to 360 degrees?

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360 degrees. (All polygons have an exterior angle sum of 360 degrees.)

Because the angle sum of all quadrilaterals is 360 degrees.

The interior angles of all quadrilaterals sum to 360 degrees. Since a parallelogram is a quadrilateral, its interior angles must sum to 360 degrees.

360 degrees

360 degrees

It is 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.

Because angles around a point add up to 360 degrees.

The sum of the interior angles of a rectangle is 360 degrees, but that is not the only sum possible.

The sum of all the exterior angles is 360 degrees. The sum of all the interior angles is 720 degrees.

360 degrees.

360 degrees.

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