Properties of Trapezoids

Front

What is a trapezoid?

Back

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

Front

What are the properties of trapezoids?

Back

Trapezoids have one pair of parallel sides, and the angles adjacent to each base are supplementary.

Front

What is an isosceles trapezoid?

Back

An isosceles trapezoid is a trapezoid in which the non-parallel sides (legs) are congruent.

Front

What does it mean for sides to be congruent?

Back

Congruent sides are sides that are equal in length.

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

What is the relationship between the diagonals of an isosceles trapezoid?

Back

The diagonals of an isosceles trapezoid are congruent.

Front

How do you find the length of the bases in a trapezoid?

Back

The length of the bases can be found using the formula: (Base1 + Base2) / 2 = Average base length.

Front

What is the measure of the angles in an isosceles trapezoid?

Back

In an isosceles trapezoid, the angles adjacent to each base are equal.

Front

If one angle of a trapezoid is 70 degrees, what is the measure of the adjacent angle?

Back

The adjacent angle is 110 degrees, since they are supplementary (70 + 110 = 180 degrees).

Front

What is the formula for the area of a trapezoid?

Back

The area of a trapezoid is given by the formula: Area = (Base1 + Base2) / 2 * Height.