All three angles must add up to 180Ëš. The sum of interior angles in a quadrilateral is 360Ëš. In a square or rectangle, each interior angle is 90Ëš. In irregular quadrilaterals, each angle is a ...
As you can see, some quadrilaterals share more properties than four sides and four angles. Look at this rhombus and square. These two quadrilaterals also share 2 pairs of parallel lines and 4 ...
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