Area of Polygons Check In

Match the following names of polygons with the number of sides they have.

• 7

• heptagon

• 12

• decagon

• 9

• dodecagon

• 10

• nonagon

• 5

• pentagon

Tags

CCSS.2.G.A.1

Label the sides of the right triangle you always start with.

a

b

c

0.5s

a

What does 10.9 represent in this problem?

• n (number of sides)

• a (apothem)

• s (side length)

Tags

CCSS.3.MD.D.8

What does 5 represent in this problem?

• n (number of sides)

• a (apothem)

• s (side length)

What does 7.5 represent in this problem?

• n (number of sides)

• a (apothem)

• s (side length)

If you were to draw the right triangle to solve for the apothem, what would be the measure of your angle?

Find the area of a regular octagon with side lengths of 17 inches and an apothem length of 20.5 inches

Mathematical Equivalence

ON

Tags

CCSS.6.G.A.1

What is the length of the apothem for a regular hexagon with side lengths of 23 cm? Round to the tenth.

Mathematical Equivalence

ON

Tags

CCSS.6.G.A.1

What is the length of the side of a regular decagon with an apothem length of 13 ft? Round to the tenth.

Mathematical Equivalence

ON

Tags

CCSS.6.G.A.1