www.mathxtc.com
Area of a Trapezium
• This is one in a series of Powerpoint slideshows to
illustrate how to calculate the area of various 2-D
shapes.
• Start with the Rectangle, then move onto the
Parallelogram.
• After that select any of Triangle, Trapezium and
Circle.
• Please feel free to copy and modify any of these
slide shows, but make sure you acknowledge the
author when doing so.
Copyright Tim Morris/St Stephen's School
TRAPEZIUM
T=top width
L=length
H=height
What
What is
is the
the area
area of
ofthis
thistrapezium?
triangle?
B=base width
Copyright Tim Morris/St Stephen's School
TRAPEZIUM
T=top width
L=length
H=height
What is the area of
this trapezium?
B=base width
COPY THIS!
Copyright Tim Morris/St Stephen's School
TRAPEZIUM
T=top width
L=length
H=height
What is the area of
this trapezium?
B=base width
PASTE HERE!
Copyright Tim Morris/St Stephen's School
TRAPEZIUM
T=top width
L=length
H=height
What is the area of
this trapezium?
B=base width
FLIP VERTICALLY!
Copyright Tim Morris/St Stephen's School
TRAPEZIUM
T=top width
L=length
H=height
What is the area of
this trapezium?
B=base width
FLIP HORIZONTALLY!
Copyright Tim Morris/St Stephen's School
TRAPEZIUM
T=top width
L=length
H=height
What is the area of
this trapezium?
B=base width
TRANSLATE TO HERE!
Copyright Tim Morris/St Stephen's School
TRAPEZIUM
T=top width
L=length
H=height
What is the area of
this trapezium?
B=base width
T=top width
CHECK MEASUREMENTS!
Copyright Tim Morris/St Stephen's School
TRAPEZIUM
T=top width
L=length
Area of the trapezium
is ½ the area of this
parallelogram?
B=base width
T=top width
Copyright Tim Morris/St Stephen's School
H=height
TRAPEZIUM
T=top width
H=height
Areatrapezium
½ (Base + Top) x Height
B=base width
T=top width
Copyright Tim Morris/St Stephen's School
TRAPEZIUM
T=top width
H=height
Areatrapezium
½ (Base + Top) x Height
B=base width
T=top width
Copyright Tim Morris/St Stephen's School