Unit 8 Review

The apothem of a 40-sided regular polygon is 11.4 meters. What is its area if each side measures 1.9 meters?

• 216.6 m²

• 433.2 m²

• 866.4 m²

• 1732.8 m²

What is the area of a regular octagon having an apothem of 13.3 meters and a side length of 11 meters?

• 585.2 m²

• 1170.4 m²

• 292.6 m²

• 2340.8 m²

What is the formula for finding the area of a regular polygon?

• A = ½ ∙P∙ a

• A = 2 ∙P∙ a

• A = ½ ∙b ∙h

• A = ½ ∙d₁d₂

What is the area of the shaded sector?

• 69.78 ft²
• 2791.11 ft²
• 558.22 ft²
• 697.78 ft²

is the formula for?

• arc length
• area of a sector
• area of a segment
• arc measure

is the formula for?

• arc length
• area of a sector
• area of a segment
• arc measure

What is the area of the shaded sector?

• 339.12 in²
• 113.04 in²
• 339.29 in²
• None of the above

Find the arc length of the sector. Round your answer to the nearest tenth.

• 8.7 m

• 7.9 m

• 3.9 m

• 11.8 m

Coach Martin has a rectangular deck that covers 80 square feet of his backyard. If Coach Martin triples the length and width of his deck, what will be the effect on the new area?

• The area is tripled.

• The area is multiplied by one-third.

• The area is not changed.

• The area is multiplied by nine.

If a rectangle is drawn and another rectangle is drawn so that the sides are twice as big as the first rectangle, what happens to the area?

• doubles
• triples
• quadruples
• not enough information