Trapezoid Shape

Properties of a Trapezoid shape.
Learn all about this quadrilateral and the properties that are unique to a trapezoid.

Welcome to MooMooMath and Science
In this video I would like to talk about the properties of a trapezoid
A trapezoid is a quadrilateral with one pair of parallel sides and one pair of non parallel sides
Because a trapezoid is a quadrilateral it has 4 sides
Because a trapezoid only has one pair of parallel sides it is not considered a parallelogram

Take a look at this house
Do you see any trapezoids?
Is this geometric shape a trapezoid
No because it does not have one pair of parallel sides
The roof is a trapezoid

The base of a trapezoid is created by the two parallel sides
Notice that the two bases are parallel
The non parallel sides are called legs


When you add all of the interior angles it equals 360 degrees.

The angles on each side are supplementary which means they add to 180 degrees

Because a trapezoid is a closed figure it has four corners which are called vertices

The median is a segment that connects the midpoint of the two legs
The median is parallel to bases and equals half the length of the two bases
Therefore, you can find the length of the median by adding the length of the two bases and divide by two

Two types of trapezoid
A right trapezoid has two right angles that are next to each other.
This is called consecutive

An isosceles trapezoid has two equal legs
Which results in the diagonals are equal length
And the base angles are congruent

You can find the area of a trapezoid by taking
½ base 1 + base 2 times the height
The height is not the side length but a line that is perpendicular to the base

In order to find the perimeter just add the length of the four sides
A + B +C + D
There you go the properties of a trapezoid