Properties of Parallelograms

Front

What is a parallelogram?

Back

A parallelogram is a four-sided figure (quadrilateral) where opposite sides are parallel and equal in length.

Front

What are the properties of the opposite angles in a parallelogram?

Back

In a parallelogram, opposite angles are equal.

Front

What is the sum of the interior angles of a parallelogram?

Back

The sum of the interior angles of a parallelogram is 360°.

Front

What happens to the diagonals of a parallelogram?

Back

The diagonals of a parallelogram bisect each other.

Front

If one angle of a parallelogram is 51°, what are the measures of the other angles?

Back

The opposite angle is also 51°, and the adjacent angles are 129° each.

Front

In a parallelogram, if one side is 39 units, what is the length of the opposite side?

Back

The opposite side is also 39 units long.

Front

What is the relationship between the diagonals of a parallelogram?

Back

The diagonals of a parallelogram bisect each other but are not necessarily equal.

Front

If the lengths of two adjacent sides of a parallelogram are 5 units and 12 units, what is the perimeter?

Back

The perimeter is 2(5 + 12) = 34 units.

Front

What is the formula for the area of a parallelogram?

Back

The area of a parallelogram is given by the formula: Area = base × height.

Front

If the base of a parallelogram is 10 units and the height is 5 units, what is the area?

Back

The area is 10 × 5 = 50 square units.