One side of the square is 8 cm. What is the perimeter of the square?
32 cm
The length of the rectangle is 2 cm. The width of the rectangle is 20cm. What is the perimeter?
Remember, opposite sides are the same!
44cm
What is the perimeter of a triangle if all the sides are 7cm?
21 cm
Trapezoid:
Two sides are 7 cm.
One side is 5 cm.
The total perimeter is 28 cm.
What is the missing side?
9 cm
What is the perimeter of a square if each side is 18cm?
72cm
Mary wants to put a fence around her house. The length of her house is 20meters and the width of her house is 17meters. How much fence should she get?
Remember, opposite sides are the same!
74 meters of fence
What is the perimeter of a triangle if all the sides are 13cm?
39 cm
Trapezoid:
Two sides are 21 cm.
One side is 8 cm.
The total perimeter is 63 cm.
What is the missing side?
13 cm
If one side of a square is 10 meters what is its perimeter?
40 meters
What is the perimeter of a rectangle if the length is 10ft and the width is 7ft?
Remember, opposite sides are the same!
34 km
What is the perimeter of an equilateral triangle that has sides that are 12 inches long?
36 in
7 units
What is the perimeter of a square with a side length of 13ft?
52ft
How do we find the perimeter of a rectangle?
add up all 4 sides!
A park is shaped like a triangle. Two sides are 60 meters long, and the other side is 20 meters. What is the perimeter of the park?
140 meters
How do you find the length of an unknown side?
Add what you know.
Subtract that answer from the total perimeter.
What is the perimeter of a square with a side length of 25in?
100 inches
What is the perimeter of a rectangle that has a width of 5 inches and a length that is 12 inches?
Remember, opposite sides are the same!
34 inches
How do you find the perimeter of a triangle?
Add up all 3 sides!
How do you feel about solving for an unknown side?
A. I could teach it to someone!
B. I think I need a little more practice, but I almost have it!
C. I need a lot more practice and that's okay!
(see student responses)