Chapter 8 - Area
8.1 - Areas of Parallelograms and
Rectangles
Objective
• Students will derive through
discovery and investigation
area formulas for rectangles
and parallelograms
Area of a Rectangle
The area of a rectangle is the product of its base
and height.
h
A = bh
b
Area of a Parallelogram
The area of a parallelogram is the product of a
base and the corresponding height.
A = bh
h
b
The base of a parallelogram is any of its sides.
The corresponding altitude is a segment
perpendicular to the line containing the base
drawn to the side opposite the base.
The height is the length of the altitude.
h
b
h
b
Find the area of the parallelogram.
a. 96m²
b. 20m²
c. 84m²
a. 120m²
b. 150m²
c. 180m²
Find the value of h in each parallelogram.
a. 4m
b. 17.2m²
c. 3.44m²
A diagonal divides any parallelogram into two
congruent triangles.
HomeFun
Worksheet!!
Journal Entry
Choose 1
Selection 2:
Selection 1:
Area is described as the
Words describe who you
space within a closed
are as a person. When you figure. Describe a time
think of yourself what are when you would use area
the first 5 words that come formula in to solve a real
to mind?
life problem.
Explain how each words
describes you.
At least 5 sentences.