Geometry - Quadrilaterals

Front

What is a quadrilateral?

Back

A quadrilateral is a polygon with four sides, four vertices, and four angles.

Front

What are the properties of a rectangle?

Back

A rectangle has opposite sides that are equal in length, all angles are right angles (90 degrees), and the diagonals are equal in length.

Front

What is the formula for the area of a rectangle?

Back

Area = length × width.

Front

What is a parallelogram?

Back

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

Front

What are the properties of a parallelogram?

Back

Opposite sides are congruent, opposite angles are congruent, and the diagonals bisect each other.

Front

What is the formula for the area of a parallelogram?

Back

Area = base × height.

Front

What is the relationship between the opposite angles of a parallelogram?

Back

The opposite angles of a parallelogram are congruent.

Front

What is the relationship between the opposite sides of a parallelogram?

Back

The opposite sides of a parallelogram are congruent.

Front

How do you find the length of a diagonal in a rectangle?

Back

Use the Pythagorean theorem: diagonal = √(length² + width²).

Front

If one angle of a rectangle is 90 degrees, what are the measures of the other angles?

Back

All angles in a rectangle are 90 degrees.