Polygons Perimeter and Circumference

Find the area of a regular  dodecagon with a perimeter of 144 cm.

• 1247 cm²

• 1523 cm²

• 1612.2 cm²

• 1845 cm²

A regular pentagon has side length 4 in. What is its perimeter?

• 20 in

• 10 in

• 12 in

• 40 in

Which is false?

• The perimeters of similar regular polygons are in proportion.

• The areas of similar regular polygons are in proportion.

• The sides of similar regular polygons are in proportion.

• None of the others are false.

Two similar polygons have side lengths in the ratio of 2/3. What is the ratio of their perimeters?

• 2/3

• 4/9

• It depends on the side lengths.

• It depends on how many sides there are.

Circumferences are to circles as _____________________________ are to polygons.

• Area

• Volume

• Perimeter

• Surface Area

The scale factor of two similar figures is 4 : 5. What is the ratio of their perimeters?

• 4 : 5

• 16 : 25

• 64 : 125

• 8 : 10

Find the missing perimeter.

• 15

• 20

• 25

• 30

What is the PERIMETER of this rectangle?

• 22 sq. yd.

• 22

• 22 cm

• 22 yd.

What is the distance along the edge of a figure.

• Perimeter

• Area

How do you find the perimeter of a shape?

• Add up all the side lengths

• Count the number of sides

• Length x Width

• Add the height and the base length of each shape