Perimeter and Unknown Side Lengths

Laura draws two rectangles.

One rectangle has a side that is 2 cm. and another side that is 8 cm.

The other rectangle has a side that is 3 cm. and another side that is 4 cm.

Which rectangle has the greatest perimeter?

• The 2 cm. by 8 cm. rectangle

• The 3 cm. by 4 cm. rectangle

Tim places two regular hexagons side by side as shown to make a new shape Each side measures 6 centimeters. Find the perimeter of his new shape.

• 36 cm.

• 16 cm.

• 60 cm.

• 72 cm.

Tags

CCSS.3.MD.D.8

What are the possible perimeters his rectangle could be?

• 1 in. x 12 in.

• 2 in. x 6 in.

• 3 in. x 4 in.

• All of the above.

Tags

CCSS.3.MD.D.8

What is the perimeter of the triangle?

• 24 cm

• 15 cm

• 120 cm

• 20 cm

Tags

CCSS.3.MD.D.8

Find the unknown side length if the perimeter is 30 cm.

• 5 cm

• 4 cm

• 8 cm

• 10 cm

Tags

CCSS.3.MD.D.8

Squares are equal on all sides. Perimeter is the measure of ALL the way around an object. So, the perimeter of this square would be ... Pick all that apply.

• 5 + 5 + 5 + 5 = 20

• 5 x 4 = 20

• 5 x 5 = 25

• 5 + 5 = 10

Tags

CCSS.4.MD.A.3

What is the perimeter?
(click to show image)

• 20 metres

• 40 metres

• 60 metres

• 200 metres

Tags

CCSS.3.MD.D.8

What is the perimeter of this shape?

• 10 cm

• 16 cm

• 20 cm

• 26 cm

Tags

CCSS.3.MD.D.8

What is the perimeter? (Hint: this is a square with equal sides!)

• 4 in.

• 16 in. 

• 8 in. 

Tags

CCSS.4.MD.A.3

How do you find perimeter?

• Add 2 side lengths

• Add all the side lengths

• Multiply length x width

• Subtract 1 side length from another

Tags

CCSS.3.MD.D.8