Transcript Trapezoid

By Christian Ornelas
Trapezoid
A quadrilateral with one pair of parallel sides.
Bases and Legs
Bases
The two parallel lines are called the bases. In the picture
below, AD and BC are the bases.
Legs
The two non parallel lines are called the legs. In the picture
below, AB and CD are the legs.
The area of a trapezoid
To find the area, you need to:
1. Add both of the bases together.
2. Divide the sum by two.
3. Multiply that by the height.
Mid-Segment
The mid-segment (EF) is the segment that joins the
midpoints of the non-parallel sides (AB and CD).
Its length is equal to the average of the lengths of
the bases (AD and BC) of the trapezoid.
Isosceles Trapezoid
An isosceles trapezoid means that the base angles
have the same measure.
The other pair of opposite angles also have the
same measure.
Perimeter of a Trapezoid
The perimeter of a trapezoid is the sum of all
the sides:
P=a+b+c+B
Adjacent angles
The angles on the same side of a leg are called
adjacent angles.
NML and MLO are supplementary.
For the same reason, MNO and NOL are
supplementary.
THE END