AnswersWHS Pre-Algebra - MA3119 B-CRTopic Test

Area of Triangles Answers

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1
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What is the area of triangle DEF?

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A
294 square centimeters
B
490 square centimeters
C
588 square centimeters
D
735 square centimeters
2
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A boat has two sails in the shape of right triangles, labeled A and B in the figure below.The three sides of sail A are each half the length of the three sides of sail B. How do the areas of the two sails compare?

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A
The area of sail A is the area of sail B.
Option A
B
The area of sail A is the area of sail B.
Option B
C
The area of sail A is the area of sail B.
Option C
D
The area of sail A is the area of sail B.
Option D
3

Jackie cut a piece of paper along its diagonal, as shown below, forming two triangles.How do the height and base length of the two triangles compare to the height and base length of the original piece of paper?

Question illustration
A
The two dimensions are the same in the triangles as they were in the rectangle.
B
The two heights are the same in the triangles as they were in the rectangle, but the bases of the triangles are half the length of the base of the rectangle.
C
The two bases of the triangles have the same length as the base of the rectangle, but the triangles have heights equal to half the height of the rectangle.
D
The two dimensions of the triangles are each half what they were in the rectangle.
4

A triangular garden has an area of 9 square yards. Which figure could represent the garden?

A
A triangle has a base of 9 yards and height of 9 yards.
Option A
B
A triangle has a base of 6 yards and a height of 6 yards.
Option B
C
A triangle has a base of 3 yards and a height of 6 yards.
Option C
D
A triangle has a base of 3 yards and a height of 3 yards.
Option D
5

What is the area of the triangle?

Question illustration
A
24 square units
B
32 square units
C
48 square units
D
96 square units
6

What expression represents the area of the triangle?

Question illustration
A
One-half times 10 times 24
Option A
B
One-half times 10 times 26
Option B
C
One-half times 24 times 26
Option C
D
One-half times 10 times 24 times 26
Option D
7

What is the area of triangle HGF? Round your answer to the nearest tenth of a square centimeter. Recall that you need to round up if the value of the hundredth is 5 or greater.

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Answer not available
8

What is the area of the shaded triangle inside the square? Round your answer to the nearest square inch.

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Answer not available
9

Aiden calculated the area of triangle QRS below by finding half the product of 1.5 and 1.1. What error did Aiden make?

Question illustration
A
Aiden should have found half the product of 1.1 and 1.2 because the 1.5 line is not a dotted line in the figure.
B
Aiden should have found half the product of 1.1 and 5.4 because the 1.5 line is not perpendicular to the 1.1 line.
C
Aiden should have found half the product of 1.5 and 1.2 because the 1.1 line is not perpendicular to the 1.5 line.
D
Aiden should have found half the product of 1.5 and 5.4 because the 1.1 line is a dotted line and not part of the figure.
10

The shaded figure below is a diagram of a triangular tabletop.Which two measures can be used as the base and height when finding the area of the tabletop?

Question illustration
A
113 cm and 140 cm
B
113 cm and 192 cm
C
159 cm and 140 cm
D
159 cm and 192 cm

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