12-5-2 Bell Ringer.Parallelograms & Trapezoid

Front

What is a parallelogram?

Back

A parallelogram is a four-sided figure (quadrilateral) with opposite sides that are parallel and equal in length.

Front

What are the properties of a rectangle?

Back

A rectangle is a parallelogram with four right angles (90 degrees) and opposite sides that are equal in length.

Front

How do you find the area of a parallelogram?

Back

Area = base × height.

Front

What is a trapezoid?

Back

A trapezoid is a four-sided figure (quadrilateral) with at least one pair of parallel sides.

Front

What is the formula for the area of a trapezoid?

Back

Area = (1/2) × (base1 + base2) × height.

Front

If the lengths of the bases of a trapezoid are 10 and 6, and the height is 4, what is the area?

Back

Area = (1/2) × (10 + 6) × 4 = 32.

Front

What is the relationship between the angles in a trapezoid?

Back

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

Front

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

Back

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

Front

What is the measure of each angle in a rectangle?

Back

Each angle in a rectangle measures 90 degrees.

Front

If one angle of a trapezoid is 65 degrees, what is the measure of the adjacent angle if the other pair of angles are equal?

Back

The adjacent angle would be 115 degrees.