Area of Circles and Composite Shapes

The diagram below shows the radius of the circular opening of a bowl. What is the approximate circumference of the opening in centimeters?

• 29.83

• 9.5

• 59.66

Mrs. Wilson placed the welcome mat shown below on her front door step. What is the area of her welcome mat in square feet?

• A = 30.15

• A = 25.12

• A = 56.12

• A = 16.5

• 153.86 cm
• 21.98 cm
• 21.98 cm²
• 153.86 cm²

What is the area of the composite shape?

• 40 ft2

• 9 ft2

• 61 ft2

• 49 ft2

What is the area of the composite shape?

• 154 cm2

• 459 cm2

• 396 cm2

• 522 cm2

Find the volume:

• 960 cm ³

• 240 cm ³

• 960 cm ²

• 1920 cm ³

What is the formula for calculating the area of a circle?

• 2πr

• πr^2

• 2πd

• πd

How can the area of a composite figure be calculated if the areas of the subdivisions are known?

• By dividing the areas of the subdivisions

• By multiplying the perimeters of the subdivisions

• By subtracting the areas of the subdivisions

• By adding the areas of the subdivisions

What attribute is used to determine the area of subdivisions in a composite figure?

• Area

• Perimeter

• Volume

• Circumference

What types of plane figures can be used to subdivide a composite figure?

• Rectangles, circles, pentagons, trapezoids, hexagons, octagons

• Circles, ovals, hexagons, octagons, squares, triangles

• Triangles, rectangles, squares, trapezoids, parallelograms, circles, and semicircles

• Triangles, squares, circles, ovals, parallelograms