Chapter 8 Practice Test

1. Determine the area of the figure below.

42

98

49

1,372

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Explanation

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2. Find the perimeter of the triangle shown.

114 ft

150 ft

154 ft

179 ft

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Explanation

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3. Find the perimeter of the parallelogram.

55 in.

70 in.

90 in.

110 in.

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Explanation

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4. Find the perimeter of a triangle with sides 9cm, 10cm and 12cm.

19cm

21cm

22cm

31cm

The perimeter of a triangle is the sum of the lengths of its sides. In this case, the lengths of the sides are 9cm, 10cm, and 12cm. Adding these lengths together gives us a perimeter of 31cm.

Explanation

The perimeter of a triangle is the sum of the lengths of its sides. In this case, the lengths of the sides are 9cm, 10cm, and 12cm. Adding these lengths together gives us a perimeter of 31cm.

5. Find the area of the parallelogram.

Remember Area is length times HEIGHT. (Not the length of the tilted side).
Remember the song...A parallelogram's area is simple, multiply the base times height!

Explanation

Remember Area is length times HEIGHT. (Not the length of the tilted side).
Remember the song...A parallelogram's area is simple, multiply the base times height!

6. Find the circumference of the circle.

8.792cm

24.618cm

17.584cm

25.321cm

The circumference of a circle can be found using the formula C = 2πr, where r is the radius of the circle. In this case, the circumference is given as 17.584cm, which means that the radius of the circle must be approximately 8.792cm (since the radius is half the circumference). Therefore, the given answer is correct.

Explanation

The circumference of a circle can be found using the formula C = 2πr, where r is the radius of the circle. In this case, the circumference is given as 17.584cm, which means that the radius of the circle must be approximately 8.792cm (since the radius is half the circumference). Therefore, the given answer is correct.

7. What is the radius of the circle?

20.5yd

20yd

128.74yd

22yd

The radius of a circle is the distance from the center of the circle to any point on its circumference. In this question, the correct answer is 20.5yd, which means that the distance from the center of the circle to any point on its circumference is 20.5 yards.

Explanation

The radius of a circle is the distance from the center of the circle to any point on its circumference. In this question, the correct answer is 20.5yd, which means that the distance from the center of the circle to any point on its circumference is 20.5 yards.

8. A window is 2 feet wide. It's length is twice its width. Find the area of the window. (Hint: drawing a picture will probably help)

The area of a rectangle is calculated by multiplying its length by its width. In this case, the width of the window is given as 2 feet. The length of the window is stated to be twice its width, which means it is 4 feet. Therefore, the area of the window can be found by multiplying 2 feet (width) by 4 feet (length), resulting in an area of 8 square feet.

Explanation

The area of a rectangle is calculated by multiplying its length by its width. In this case, the width of the window is given as 2 feet. The length of the window is stated to be twice its width, which means it is 4 feet. Therefore, the area of the window can be found by multiplying 2 feet (width) by 4 feet (length), resulting in an area of 8 square feet.

9. A rectangular table cloth has a length of 90 inches and a width of 60 inches. What is the perimeter of the tablecloth?

5,400cm

150cm

300cm

250cm

The perimeter of a rectangle is calculated by adding the lengths of all four sides. In this case, the length is 90 inches and the width is 60 inches. Therefore, the perimeter would be 2 times the length plus 2 times the width, which is (2 * 90) + (2 * 60) = 180 + 120 = 300 inches.

Explanation

The perimeter of a rectangle is calculated by adding the lengths of all four sides. In this case, the length is 90 inches and the width is 60 inches. Therefore, the perimeter would be 2 times the length plus 2 times the width, which is (2 * 90) + (2 * 60) = 180 + 120 = 300 inches.

10. Find the volume of the rectangular prism.

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Explanation

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11. The figure shown is made up of a square within a square. Write an expression for the area of the shaded region.

The shaded region can be found by subtracting the area of the smaller square from the area of the larger square. The expression for the area of the shaded region is (side length of larger square)^2 - (side length of smaller square)^2.

Explanation

The shaded region can be found by subtracting the area of the smaller square from the area of the larger square. The expression for the area of the shaded region is (side length of larger square)^2 - (side length of smaller square)^2.