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The sum of interior angles in a quadrilateral is 360°. This fact is a more specific example of the equation for calculating the sum of the interior angles of a polygon: \(\text {Sum of interior ...
have three sides, therefore they have three angles. Interior angles in a triangle sum to a half turn (180Ëš). Quadrilaterals close quadrilateralA polygon with four straight sides. have four sides ...
Take any quadrilateral such as ABCD above. Construct the midpoints of each side and join them to form another quadrilateral EFGH. Varignon's Theorem asserts that the ...
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