Finding Perimeter When a Side Length Is Missing

Find the perimeter. 

• Perimeter = 48 units
• Perimeter = 59 units
• Perimeter = 58 units
• Perimeter = 61 units

Find the missing sides.

• A=4
  B=7
  C=12
• A=3
  B=7
  C=12
• A=13
  B=5
  C=12
• A=7
  B=7
  C=10

Find the missing sides.

• A =5
  B = 5
• A = 4
  B = 6
• A=7
  B=7
• A = 2
  B= 3

Find the perimeter.

• Perimeter = 30 units
• Perimeter = 28 units
• Perimeter = 38 units
• Perimeter = 36 units

Find the missing sides. 

• A=11
  B=12
• A=11
  B=13
• A=12
  B= 10
• A=11
  B=11

Find the perimeter.

• Perimeter = 80 units
• Perimeter = 84 units
• Perimeter = 74 units
• Perimeter = 85 units 

What is the length of side S?

• 2m
• 11m
• 15m
• 9m

A triangular sign has a perimeter of 70 inches. Two of the sides are each 19 inches. What is the length of the 3rd side in inches?

• 32
• 89
• 51
• A triangle has 3 sides.

A square has a perimeter of 48 yards. What is the length of each side?

• 96
• 192
• 12
• 52

A triangular puzzle has a perimeter of 99 centimeters. Two of the sides are each 37 centimeters long. How long is the missing side?

• 136 cm
• 62 cm
• 25 cm
• 25 inches