Area of Composite Shapes with Semicircles

In a composite figure, what is the purpose of subdividing the figure into known shapes?

• To simplify calculations

• To change the shape of the figure

• To increase the area of the figure

• To decrease the perimeter of the figure

When solving contextual problems involving composite plane figures, what should be the final step?

• Subdividing the figure into known shapes

• Identifying the number of sides in the figure

• Finding the dimensions of the figure

• Calculating the area or perimeter of the entire figure

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

• Area

• Perimeter

• Volume

• Circumference

Find the area of the shape. Give your answer to 1 decimal place...

• 39.3cm²

• 78.5cm²

• 15.7cm²

• 31.4cm²

A semicircle opening above the entrance at Six Flags has a diameter of 15 feet.  What is the area of this opening?  Round to the nearest tenth.

• 706.5 square feet

• 47.1 square feet

• 88.3 square feet

• 176.6 square feet

• 284.52 ft2

• 228 ft2

• 317 ft2

• 116.71 ft2

What is the area of the composite figure? (use 3.14 for pi)

• 14 cm²

• 6.28 cm²

• 12.56 cm²

• 20.28 cm²

• 296.96 m2
• 248.96 m2
• 98.24 m2
• 73.12 m2

Find the composite area.

• 72.12

• 146.24

• 96

• 121.12

A local restaurant places tissue-paper liners in a basket for rolls as shown in the picture. How many square centimeters of tissue paper is needed to make one liner?

• 216.7 cm²

• 257.9 cm²

• 379.3 cm²

• 408.1 cm²