Finding Perimeter of a Polygon

What is the perimeter of this polygon? (Find the length of the missing sides first)

What is the perimeter of this polygon?

Given the perimeter, find the missing side-length.

One side of a rectangle is 5 metres long. Another side of the rectangle is 8 metres long. What are the lengths of the other two sides of the rectangle?

• 5 m and 5 m

• 8 m and 5 m

• 8 m and 8 m

• They could be any length

Alessandra has a garden at home that is 4 feet by 9 feet. What is the perimeter of Alessandra's garden?

• 36 feet

• 26 feet

• 21 feet

• 31 feet

The United States Department of Defence operates out of 'The Pentagon', named after its equilateral polygon shape.

Ivana wants to find the perimeter of The Pentagon by walking along one side. She knows that every step she takes is 0.8 metres. It takes her 350 steps to cover one side-length of The Pentagon. What is the perimeter of the entire building?

• 1750 m

• 1404 m

• 1400 m

• 2188 m

Matteo bought a calendar with different types of insects inside. When he bought it, it was plastic-wrapped and in the shape of a square with one side measuring 14 inches. When he hangs it on his wall, the calendar is opened up. What is the perimeter of the opened calendar?

• 56 inches

• 112 inches

• 84 inches

• 98 inches

Jonathan has an octagon dog pen at home that is 16 feet long when stretched out from end to end. When he shapes it back into an octagon, what is the length of one side?

• 2 feet

• 4 feet

• 2.7 feet

• 2.3 feet

Given this beautiful yellow triangle, what is the perimeter of the triangle in metres?

The perimeter of a RHOMBUS is 56 dm, what is the length of one side?