## Parallelogram

### A parallelogram is a quadrilateral (a polygon with four sides) in which opposite sides are parallel and equal in length

A parallelogram is a quadrilateral (a polygon with four sides) in which opposite sides are parallel and equal in length. This means that the opposite sides of a parallelogram never intersect and are always of the same length.

Properties of a parallelogram:

1. Opposite sides are parallel: This means that if you extend the sides of a parallelogram, they will never meet or intersect.

2. Opposite sides are equal in length: The lengths of the opposite sides of a parallelogram are always equal.

3. Opposite angles are equal: The opposite angles of a parallelogram are congruent, meaning they have the same measure.

4. Consecutive angles are supplementary: The consecutive angles (adjacent angles sharing a side) of a parallelogram always add up to 180 degrees.

5. Diagonals bisect each other: The diagonals of a parallelogram intersect at their midpoints, meaning they divide each other into two equal parts.

Some commonly known types of parallelograms include rectangles, squares, and rhombuses. Here are some specific properties of these types of parallelograms:

1. Rectangle: A rectangle is a type of parallelogram where all angles are right angles (90 degrees). Opposite sides are still parallel and congruent in length.

2. Square: A square is a special type of rectangle where all sides are equal in length. It has all the properties of a rectangle and a parallelogram.

3. Rhombus: A rhombus is a parallelogram where all sides are equal in length. The opposite angles are still congruent, but they are not necessarily right angles.

To determine the area of a parallelogram, you can use the formula:

Area = base × height, where the base is the length of one of the parallel sides, and the height is the perpendicular distance between the base and the opposite side.

In summary, a parallelogram is a quadrilateral with opposite sides that are parallel and equal in length. It has various properties, including parallel sides, equal opposite sides, equal opposite angles, supplementary consecutive angles, and diagonals that bisect each other. Different types of parallelograms include rectangles, squares, and rhombuses. The area of a parallelogram can be calculated using the formula base × height.

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