Composite Area

1. Mason needs to purchase new glass for the window pictured here.  About how many square feet of glass will he need to purchase? 

• 20 ft²
• 13 ft²
• 26 ft²
• 41 ft²

2. The figure shows a circle inside a triangle.  Which equation could be used to find the area of the shaded region?

• A = ½bh - 2πr
• A = πr² - ½bh
• A = ½bh - πd
• A = ½bh - πr²

6. The figure shows 2 circles inside a trapezoid.
Which procedure should be used to find the area of the shaded region?

• Subtract the perimeter of the trapezoid from the area of both circles.
• Subtract the circumference of both circles from the area of the trapezoid.
• Subtract the area of the trapezoid from the area of both circles.
• Subtract the area of both circles from the area of the trapezoid.

7. Which of the following is closest to the area of the figure shown?

• 420 cm²
• 521 cm²
• 320 cm²
• 1,124 cm²

10. Which equation can be used to find the area of the composite figure shown?

• A = 8(15) + ½(15×7) + ½(9×8)
• A = 8(15) + 15(7) + 9(8)
• A = 24(8) + ½(15×7)
• A = 15(15) + ½(9×8)