squares
rectangles
triangles
unknown sides
100
One side of the square is 8 cm. What is the perimeter of the square?
32 cm
100
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
100
What is the perimeter of a triangle if all the sides are 7cm?
21 cm
100
Trapezoid:
Two sides are 7 cm.
One side is 5 cm.
The total perimeter is 28 cm.
What is the missing side?
9 cm
200
What is the perimeter of a square if each side is 18cm?
72cm
200
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
200
What is the perimeter of a triangle if all the sides are 13cm?
39 cm
200
Trapezoid:
Two sides are 21 cm.
One side is 8 cm.
The total perimeter is 63 cm.
What is the missing side?
13 cm
300
If one side of a square is 10 meters what is its perimeter?
40 meters
300
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
300
What is the perimeter of an equilateral triangle that has sides that are 12 inches long?
36 in
300
7 units
400
What is the perimeter of a square with a side length of 13ft?
52ft
400
How do we find the perimeter of a rectangle?
add up all 4 sides!
400
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
400
How do you find the length of an unknown side?
Add what you know.
Subtract that answer from the total perimeter.
500
What is the perimeter of a square with a side length of 25in?
100 inches
500
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
500
How do you find the perimeter of a triangle?
Add up all 3 sides!
500
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)