CONCEPTS
- The figure below shows a kitchen floor that is covered
with 1-foot-square tiles. Without counting allof the
squares, determine the area of the floor.
- Tell which concept applies, perimeter or area.
a. The length of a walk around New York’s Central
Park
b. The amount of office floor space in the White
House
c. The amount of fence needed to enclose a
playground
d. The amount of land in Yellowstone National
Park
- Give the formula for the perimeter of a
a. square b. rectangle
- Give the formula for the area of a
a. square b. rectangle
c. triangle d. trapezoid
e. parallelogram
- For each figure below, draw the altitude to the base b.
a. b.
c. d.
- For each figure below, label the base for the given
altitude.
a. b.
c. d.
h
h
h
h
b
b b
b b
- The shaded figure below is a combination of what two
types of geometric figures?
- Explain how you would find the area of the following
shaded figure.
NOTATION
Fill in the blanks.
- a. The symbol 1 in.^2 means one.
b. One square meter is expressed as.
- In the figure below, the symbol indicates that
the dashed line segment, called an altitude,is
to the base.
GUIDED PRACTICE
Find the perimeter of each square.See Example 1.
- A square with sides 5.75 miles long
- A square with sides 3.4 yards long
Find the perimeter of each rectangle, in inches.See Example 2.
- 6 ft
2 in.
2 ft
7 in.
93 in.
93 in.
8 in. 93 in. 93 in.
8 in.
8 in.
8 in.
A B
D C
AB || DC
AD || BC
A B
E D
C
9.7 Perimeters and Areas of Polygons 787
