Trapezoids

Front

What is a trapezoid?

Back

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

Front

What are the base angles of an isosceles trapezoid?

Back

The base angles of an isosceles trapezoid are congruent.

Front

How do you find the measure of the midsegment of a trapezoid?

Back

The measure of the midsegment is the average of the lengths of the two bases.

Front

If the bases of a trapezoid are 20 and 30, what is the length of the midsegment?

Back

The length of the midsegment is (20 + 30) / 2 = 25.

Front

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

Back

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

Front

In a trapezoid, if one angle is 65 degrees, what is the measure of the consecutive angle?

Back

The consecutive angle is supplementary, so it is 115 degrees.

Front

What is the relationship between the angles in a trapezoid?

Back

The angles on the same side of a trapezoid are supplementary.

Front

What is the formula for the area of a trapezoid?

Back

The area of a trapezoid is A = (1/2) * (b1 + b2) * h, where b1 and b2 are the lengths of the bases and h is the height.

Front

If the height of a trapezoid is 10 and the bases are 15 and 25, what is the area?

Back

The area is A = (1/2) * (15 + 25) * 10 = 200.

Front

What type of trapezoid has non-parallel sides that are equal in length?

Back

An isosceles trapezoid.