Missing Sides and Angles of Quadrilaterals

Front

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

Back

360 degrees.

Front

If one angle of a quadrilateral is 70° and the other three angles are equal, what is the measure of each of the equal angles?

Back

Each of the equal angles measures 96.67°.

Front

What is a quadrilateral?

Back

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

Front

In a rectangle, if one side is 10 units long, what is the length of the opposite side?

Back

The opposite side is also 10 units long.

Front

How do you find the measure of a missing angle in a quadrilateral?

Back

Subtract the sum of the known angles from 360°.

Front

What is the measure of each angle in a square?

Back

Each angle in a square measures 90°.

Front

If a quadrilateral has angles measuring 85°, 95°, and 80°, what is the measure of the fourth angle?

Back

The fourth angle measures 100°.

Front

What is the relationship between the angles of a rectangle?

Back

All angles in a rectangle are right angles (90° each).

Front

If two angles of a quadrilateral are 60° and 120°, what is the sum of the other two angles?

Back

The sum of the other two angles is 180°.

Front

What is the formula to calculate the sum of the interior angles of any polygon?

Back

(n - 2) × 180°, where n is the number of sides.