Missing Sides and Angles of Quadrilaterals

Front

What is a quadrilateral?

Back

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

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

If one angle of a quadrilateral is 90 degrees, what is the sum of the other three angles?

Back

The sum of the other three angles is 270 degrees.

Front

What is a rectangle?

Back

A rectangle is a quadrilateral with opposite sides that are equal and all angles that are right angles (90 degrees).

Front

How do you find the missing angle in a quadrilateral?

Back

To find the missing angle, subtract the sum of the known angles from 360 degrees.

Front

If two angles of a quadrilateral are 70° and 80°, what is the measure of the other two angles?

Back

The sum of the other two angles is 210°, and they can be any combination that adds up to 210°.

Front

What is the relationship between the sides of a rectangle?

Back

In a rectangle, opposite sides are equal in length.

Front

How do you calculate the length of a side in a rectangle if you know the area?

Back

To find the length of a side, divide the area by the length of the other side.

Front

What is the measure of an angle in a square?

Back

Each angle in a square measures 90 degrees.

Front

If a quadrilateral has three angles measuring 60°, 70°, and 80°, what is the measure of the fourth angle?

Back

The fourth angle measures 150°.