Parallelograms, Rectangles, Rhombi and Squares

Front

What is a parallelogram?

Back

A parallelogram is a quadrilateral with opposite sides that are both parallel and equal in length.

Front

What are the properties of a rectangle?

Back

1. Opposite sides are equal and parallel. 2. All angles are right angles (90 degrees). 3. Diagonals are equal in length.

Front

What defines a rhombus?

Back

A rhombus is a quadrilateral with all four sides of equal length and opposite angles that are equal.

Front

What is a square?

Back

A square is a special type of rectangle and rhombus where all four sides are equal and all angles are right angles.

Front

What is the relationship between the diagonals of a rhombus?

Back

The diagonals of a rhombus bisect each other at right angles.

Front

How can you prove a quadrilateral is a parallelogram?

Back

A quadrilateral is a parallelogram if one pair of opposite sides is both congruent and parallel.

Front

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

Back

The sum of the interior angles of a quadrilateral is 360 degrees.

Front

What is the formula for the area of a rectangle?

Back

Area = length × width.

Front

What is the formula for the area of a rhombus?

Back

Area = (d1 × d2) / 2, where d1 and d2 are the lengths of the diagonals.

Front

What is the formula for the area of a square?

Back

Area = side².