Perimeter of Triangle

The sum of lengths of all sides of plane figure is called its____

• Area

• Perimeter

• Boundary

• None of the above

What is the perimeter of an equilateral triangles whose side is 25 cm?

• 50 cm

• 100 cm

• 75 cm

• 125 cm

Do you add, subtract, multiply or divide the sides to find perimeter

• divide

• multiply

• add

• subtract

A triangle of sides 12 cm, 5 cm and 13 cm. Find its perimeter

• 20 cm

• 25 cm

• 28 cm

• 30 cm

The perimeter of the equilateral triangle is 15 inches. Select ALL equations that could be used.

(a)   ​ ​ (b)  

• 3x = 15

• x + x + x = 15

• x =153

• x = 15 – 3

The perimeter of the isosceles triangle is 365 millimeters. What is the length of the missing side?

c

41 mm

39 mm

38 mm

163

202 mm

The perimeter of the triangle shown is 17x units. The dimensions of the triangle are given in units. Which equation can be used to find the value of x?​ (a)   What is the perimeter of the triangle?​ (b)   units.

• 51

• 3

• 21

• 82

• 5

The perimeter of the triangle shown is 17x units. The dimensions of the triangle are given in units. Which equation can be used to find the value of x?​ (a)   What is the perimeter of the triangle?​ (b)   units.

• 51

• 3

• 21

• 82

• 5

What is the perimeter of this triangle?

• 23 units

• 25 units

• 32 units

Jose lives next to a triangular park. He likes to take his dog for a walk around the park on the weekend. If he makes 3 trips around the park how far does he walk?

• 17 units

• 25 units

• 51 units

• 102 units