Area of Circles and Regular Polygons

The area of a circle is 78.5 cm². What is the radius?

What does the 'a' stand for in the following formula?

• area 

• apossum

• altitude

• apothem

Find the area of this regular polygon

• 81.8 m²

• 204.4 m²

• 408.8 m²

• 40.8 m²

What is the formula for area of a regular polygon.

• ½⋅apothem⋅perimeter

• a² + b² = c²

• πr²

• √x²+y²

What is the area of the shaded sector?

• 339.12 in²

• 113.04 in²

• 339.29 in²

• None of the above

Find the area of the regular polygon.

• 428.8 in. ²

• 400.5 in²

• 397.7 in²

• 842.5 in²

Find the area of the circle.

• 18.84 m²

• 113.04 m²

• 37.68 m²

• 452.16 m²

Find the area of the circle.

• 176.6 cm²

• 706.5 cm²

• 23.6 cm²

• 50.24 cm²

Shring's dining room table is round and has a radius of 4.5 feet. What is the tabletop's area?

• 63.585 ft²

• 68.345 ft²

• 64.585 ft²

• 61.345 ft²

Find the area of the regular polygon

• 172.0 in.²

• 170.0 in.²

• 17.2 in²

• 50 in.²