Quadrilaterals: Missing angles

Front

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

Back

360 degrees.

Front

Name a shape that has four sides and is a type of quadrilateral.

Back

Examples include rectangle, square, and parallelogram.

Front

If three angles of a quadrilateral are 90°, 85°, and 115°, what is the fourth angle?

Back

The fourth angle is 70°.

Front

What do you call a quadrilateral with opposite sides that are equal and parallel?

Back

A parallelogram.

Front

What is a square?

Back

A square is a quadrilateral with all sides equal and all angles 90°.

Front

What is the formula to find the missing angle in a quadrilateral?

Back

The formula is: Missing angle = 360° - (sum of the other three angles).

Front

What is a rhombus?

Back

A rhombus is a quadrilateral with all sides equal and opposite angles equal.

Front

If one angle of a quadrilateral is 120° and the other three angles are equal, what is the measure of each of the equal angles?

Back

Each of the equal angles is 60°.

Front

What is the difference between a rectangle and a square?

Back

A rectangle has opposite sides equal, while a square has all sides equal.

Front

What is a trapezoid?

Back

A trapezoid is a quadrilateral with at least one pair of parallel sides.