Try this:
http://www.analyzemath.com/Geometry_calculators/trapezoid.html
what is the formula for the area of a trapezoid?
please include a diagram
3 answers
The area of a trapezoid is given by the formula where
b1, b2 are the lengths of the two bases
a is the altitude of the trapezoid
Recall that the bases are the two parallel sides of the trapezoid. The altitude (or height) of a trapezoid is the perpendicular distance between the two bases.
This is equivalent to the altitude times the average length of the bases. Since the median of a trapezoid is also the average length of the two bases, the area is also the altitude times the median length.
Area as a compound shape
-from a math website
b1, b2 are the lengths of the two bases
a is the altitude of the trapezoid
Recall that the bases are the two parallel sides of the trapezoid. The altitude (or height) of a trapezoid is the perpendicular distance between the two bases.
This is equivalent to the altitude times the average length of the bases. Since the median of a trapezoid is also the average length of the two bases, the area is also the altitude times the median length.
Area as a compound shape
-from a math website
Google is your friend:
try "area of trapezoid"
this one even has a nice applet
http://www.mathopenref.com/trapezoidarea.html
try "area of trapezoid"
this one even has a nice applet
http://www.mathopenref.com/trapezoidarea.html