Area and Perimeter Polygons and Circles

Find the diameter of the circle to the nearest hundredth. π = 3.14

• 31.40m

• 1.59m

• 3.20m

• 3.18m

Which formula is used to find the area of this polygon?

• A = Πr²

• A = ½bh

• A = ½h(b_{1 +} b₂)

• A = bh

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.

What is the circumference of a circle?

Area of a circle. Which is not right?

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

• 2/3

• 4/9

• It depends on the side lengths.

• It depends on how many sides there are.

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

• 20 in

• 10 in

• 12 in

• 40 in

A regular pentagon has side length 5 and apothem 5. What is its area?

• 62.5

• 125

• 25

• 12.5

What is an apothem?

• A dead rodent on the thide of the road

• The length from the midpoint of a side of a regular polygon to its center.

• The length from the vertex of a regular polygon to its center.

• half the perimeter of a regular polygon