Measurement And Geometry Worksheets With Answer Key - Holt Mcdougal Mathematics Page 2
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8Name ________________________________________ Date __________________ Class__________________
Measurement and Geometry
SECTION
8A
SECTION A Family Letter: Area
continued
The student will also learn the area formulas for rectangles,
parallelograms, triangles, and trapezoids. The area of a figure is
defined as the number of square units needed to cover a given
surface.
Figure
Formula
Words
Area equals length
A
times width.
Rectangle
A bh
Area equals base
times height.
Parallelogram
Area equals
1
A
bh
one-half the base
2
times the height.
Triangle
Area equals half
1
A
h ( b
b
)
1
2
the product of the
2
height and the sum
of the lengths of the
Trapezoid
bases.
The student will be able to use these formulas to find the areas of
composite figures. For example, the composite figure below can be
divided into three recognizable polygons. You can find the area of
each polygon and add their areas to find the total area of the
composite figure.
Sincerely,
8-2
Holt McDougal Mathematics
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