Geometry: 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 an isosceles trapezoid?

Back

An isosceles trapezoid has one pair of parallel sides and the non-parallel sides are equal in length. The base angles are also equal.

Front

What are base angles in a trapezoid?

Back

Base angles are the angles that are adjacent to each base of the trapezoid.

Front

How do you determine if a figure is a trapezoid?

Back

A figure is a trapezoid if it has at least one pair of parallel sides.

Front

If CD = 20 in an isosceles trapezoid, can you determine the length of AD?

Back

Not enough information is provided to determine the length of AD.

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

If Angle A is 72 degrees, what is the measure of Angle B in an isosceles trapezoid?

Back

Angle B is 108 degrees.

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal.

Front

What are corresponding angles?

Back

Corresponding angles are angles that are in the same position at each intersection where a straight line crosses two others.

Front

What is the formula for the area of a trapezoid?

Back

The area of a trapezoid is given by the formula: Area = (1/2) * (Base1 + Base2) * Height.