Perimeter

Perimeter

We can calculate the perimeter of this square by adding 5+5+5+5 or 5x4 ...

which equals 20.

Let's answer some questions.

Ready?

Find the perimeter for this square and mark your answer on the next slide.

Multiple Choice

What is the perimeter of this square?

• 3 units

• 6 units

• 9 units

• 12 units

What is the perimeter of this triangle?

Be ready to answer on the next slide.

Multiple Choice

What's the perimeter of this triangle?

• 10 cm

• 11 cm

• 12 cm

• 13 cm

What's the perimeter of this triangle?

Be ready to answer on the next slide.

Multiple Choice

What's the perimeter of this triangle?

• 18 inches

• 18 feet

• 18 cm

What's the perimeter of this pentagon?

Be ready to choose your answer on the next slide.

Multiple Choice

What is the perimeter of this pentagon?

• 15 units

• 12 units

• 9 units

• 6 units

Let's challenge ourselves a little bit!

• Not all of the sides are labeled.

• You can still figure out the lengths of the unlabeled sides by looking at the sides on the opposite side.

Multiple Choice

What is the perimeter of this shape?

• 11 inches

• 22inches

Multiple Choice

If a square has a perimeter of 20cm, what are its side lengths?

• 4cm
• 5cm
• 6cm
• 7cm

Multiple Choice

Perimeter= 42 inches. Side lengths are 12in, 7in, 21in. What is the length of the missing length? 

• 3 inches
• 2 inches
• 4 inches
• 1 inch

Multiple Choice

What is the perimeter of this polygon?

• 39 in
• 24 in
• 105 in 

Multiple Choice

What is the missing measurement? 

• 9 cm
• 18 in
• 18 cm
• 9 in 

Multiple Choice

A triangle has a perimeter of 24 inches. Each side of the triangle is the same length. What is the length of one side?

• 8 inches

• 72 inches

• 3 inches

• 12 inches

Multiple Choice

Tyler needs to build a fence to keep Red Dog from stealing the neighbor's yard decorations. The pen is a square, and one side measures 14 feet. What is the perimeter of Red Dog's pen?

• 28 feet

• 46 feet

• 42 feet

• 56 feet

Poll

Which meme best describes your math skills on this quizizz?