GEOMETRY
Unit 10
Name _____________________

The area of a figure measures the size of the region _______________ by the figure. This is
measured in ___________ units (example: m2, ft2, in2)

The perimeter of a figure is the distance __________ a figure. It is the ______ of all sides. It
is measured in linear units (example: m, ft, in)
Tell whether you need to know the perimeter or the area to determine how much of each item
to buy Use P for perimeter and A for area.
______1) Amount of fencing around a garden
______2) Amount of paint to paint a room
______3) Amount of carpet for a room
______4) Amount of holiday lights to trim the doors and windows of a house
______5) Amount of ribbon to put around a present
______6) Amount of shingles for a roof
FORMULAS:
SQUARE
(s=side length)
P= _____
A= ______
Find the perimeter and area.
5 ft
1.
RECTANGLE
P=__________
2.
9m
4m
5 ft
P=________
A=_______
A=_______
P=________
A=_______
**The area of a region is the ______of the areas of its ____________________ parts.
Example:
1)
Find the area and perimeter of a
rectangle with base 18 cm and height 3 cm.
2) Find the area of a rectangle with
perimeter 48 cm and base 18 cm.
3) Find the height and perimeter of a rectangle
with base 28 and area 196 m2.
4) Find the perimeter of a square
with area 64 m2.
5) Find area and perimeter.
6) Find area and perimeter
3
15
4
4
3
3
9
5
5
4
4
3
Applications:
7) You are painting a room that is 25 ft x 40 ft. How many containers of paint must you purchase
if one container covers 50 ft2?
8) A rectangular pane of glass measuring 12 inches by 18 inches is surrounded by a wooden
frame that is 2 inches wide. What is the area of the window including the frame?
9) A garden 40 meters wide and 72 meters long is to be enclosed by a fence. At $8.75 per meter,
what will the fencing cost?