Perimeter

Do you multiply or add when you find the perimeter?

• Multiply

• Add

What is the missing measurement? 

• 9 cm

• 18 in

• 18 cm

• 9 in 

If you are finding the distance around an object, what are you solving for?  

• Area

• Volume

• Plus and Minus

• Perimeter

What is the perimeter of this rectangle?  
Length:  8 cm
Width:  4 cm

• 32 cm

• 24 square centimeters

• 24 cm

• 84 cm 

If the perimeter of a SQUARE is 16, what is the side length?  

• 8 cm

• 4 cm

• 16 cm

• cannot be solved

If the perimeter of a rectangle is 12 inches, and the length is 4 inches, what must the width be?  

• 4 inches

• cannot solve

• 2 inches

• 48 inches

How do we solve for Perimeter?  

• length x width

• L x W

• Add all the sides

• add then multiply by 4

What did I do wrong when solving for perimeter?
Length:  7 cm
Width:  4 cm
7 x 4 = 28 squared cm

• your answer should be 28 cm

• you multiplied, you should add 7 + 7 + 4 + 4

• you solved for perimeter

• you should multiply 4 x 7 

A pentagon has 5 sides, if one side is 7 inches, what is the perimeter of the pentagon?

• 5 inches

• 35 inches

• 30 inches

• 24 inches

If a rectangle is 9 cm by 2 cm, what is its perimeter?  What is its area?  

• Perimeter:  22 cm   Area:  18 squared cm

• Perimeter:  18 cm   Area:  22 squared cm

• Perimeter:  18 cm  Area:  18 squared cm

• Perimeter:  20 cm  Area:  22 squared cm