Chapter 13 Math Review

Caroline is making a triangular flag with a base of 10 inches and a height of 8 inches. What is the area of the flag? 

• 18 in.­­²

• 40 in.­­²

• 80 in.­­²

• 160 in.­­²

Two figures are arranged as shown. Which of the following can be used to find the area of the yellow figure? (2 answers)

• 9² – x²

• (9-x)²

• 2(9) + 2(9-x)

• 9² + x²

• x(9-x) + 9(9-x)

Adrian found the area of the figure. Which expression could he have used? Choose all that apply (2 answers).

• 2(3 X 5) + (4 X 10)

• (4 X 5) + (5 X 12)

• 2(5 X 4) + (4 X 10)

• (4 X 10) + (5 X 12)

Which equation can be used to find A, the area of the parallelogram shown?

• A = 5 X 9

• A = 4 X 9

•  $A\ =\ \frac{1}{2}\ \times\ 5\ \times\ 9$  

•  $A\ =\ \frac{1}{2}\ \times\ 4\ \ \times\ 9$  

Use the points shown as vertices of a right triangle with an area of 28 square units. Identify one possible third vertex of the triangle.

• (-3, -6)

• (3, 6)

• (6, 3)

• (-6, -3)

Lisa drew an arrow on the coordinate plane as shown. What is the area of the arrow? Show your work.

• 163.5 square units

• 93.5 square units

• 90 square units

• 183.5 square units

A playground has the shape of a trapezoid. The shortest side of the playground and its width have the same dimension. What is the area of the playground?

• $21\ yards\ ^2$

• $24\ yards\ ^2$

• $42\ yards\ ^2$

• $64\ yards\ ^2$

Jake drew this sketch of a kite that he wants to make. What will be the area of Jake's kite?

• $600\ cm\ ^2$

• $1,200\ cm\ ^2$

• $1,200\ in\ ^2$

• $600\ in\ ^2$

Mr. Aufleger is painting the triangular gable of his house. If the base of the triangle is 16 feet and the height is 6 feet, what is the area of the gable?

• $16\ feet\ ^2$

• $32\ feet\ ^2$

• $40\ feet\ ^2$

• $48\ feet\ ^2$