Recall the concept of a parallelogram — lesson. Mathematics State Board, Class 8.

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A parallelogram is a flat shape quadrilateral with opposite sides parallel and equal in length.

Where

$|$ and

$||$ denotes equal sides.

Properties of parallelogram:

Opposite sides are parallel.
Opposite sides are equal in length.
Opposite angles are . (Angles $A$ and $D$ are the same, and angles $B$ and $C$ are the same.)
Adjacent angles are . Angles $A$ and $B$ or $C$ and $D$ add up to $180°$ .

Important!

A parallelogram can be a square, rectangle, and rhombus with some conditions.

For example, A parallelogram became a rectangle where all angles are right angles.

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