why all parallelograms are quadrilaterals
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Question⤵
why all parallelograms are quadrilaterals
Answer⤵
These quadrilaterals are called parallelograms They take a variety of shapes, but one classic example is shown below. Imagine extending the pairs of opposite sides. They would never intersect because they are parallel. Notice, also, that the opposite angles of a parallelogram are congruent, as are the opposite sides.
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A simple (non-self-intersecting) quadrilateral is a parallelogram if and only if any one of the following statements is true: Two pairs of opposite sides are parallel (by definition). Two pairs of opposite sides are equal in length. Two pairs of opposite angles are equal in measure.
Area: b × h (base × height); ab sin θ (product of adjacent sides and sine of the vertex ...
Properties: convex
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