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Finding the Area and Missing Side-Lengths of Triangles

Total questions: 31

Worksheet time: 23mins

Name
Class
Date
1.

What is the area of figure D

a)

21 cm221\ cm^2

b)

64 cm264\ cm^2

c)

26 cm226\ cm^2

d)

40 cm240\ cm^2

2.

Mai found the area of figure D by cutting the shape in half, moving the smaller triangles together, and making a new rectangle. Which strategy best describes what Mai did?

a)

decomposing

b)

enclosing and subtracting

c)

decomposing and rearranging

3.
To calculate the amount of carpeting needed for your bedroom, which of the following should you find: 
a)
Area
b)
Perimeter
c)
Surface Area
d)
Volume
4.
a)
4 km2
b)
16 km2
c)
64 km2
d)
8 km2
5.
Area of triangle?
a)
17 units2
b)
20 units2
c)
10 units2
d)
16 units2
6.
Find the area of a triangle with a height of 4 mm and a base of 6 mm?
a)
5 mm squared
b)
6 mm squared
c)
12 mm squared
d)
24 mm squared
7.
Find the area of the figure:
a)
30 ft2
b)
60 ft2
c)
16 ft2
d)
36 ft2
8.
What is the area of a triangle with a base of 10 cm and a height of 14 cm?
a)
24 cm squared
b)
12 cm squared
c)
70 cm squared
d)
140 cm squared
9.

What is the area?

a)

6 m2

b)

16 m2

c)

4 m

d)

8 m2

10.

What is the area?

a)

9 m2

b)

10 m2

c)

20 m

d)

20 m2

11.

What is the area?

a)

27 m2

b)

54 m2

c)

54 m

d)

15 m2

12.

What is the area?

a)

27 m2

b)

54 m2

c)

54 m

d)

15 m2

13.

What is the area?

a)

12 m2

b)

24 m2

c)

16 m

d)

15 m2

14.
What is the area of the composite figure?
a)
40 sq cm
b)
65 sq cm
c)
52.5 sq cm
d)
25 sq cm
15.
What is the area of this shape?
a)
56
b)
50
c)
78
d)
I have no idea how to do this. I need to come to tutoring.
16.
Find the area of the trapezoid.
a)
36 m
b)
36 m2
c)
72 m
d)
72 m2
17.
Find the area of the figure
a)
43 sq inches
b)
102 sq inches
c)
37 inches
d)
90 sq inches
18.

There are several way to write the formula for area of a triangle. Click all that apply.

a)

12\frac{1}{2} base ×\times height

b)

base x height 2\frac{\text{base x height }}{\text{2}}

c)

\frac{1}{2} bh

d)

b2 × h\frac{b}{2}\ \times\ h

e)

None of the above

19.

What type of triangle is displayed

a)

A right triangle

b)

An acute triangle

c)

An obtuse triangle

d)

None of the above

20.

What type of triangle is displayed

a)

An acute triangle

b)

An obtuse triangle

c)

A right triangle

d)

All of the above

21.

What type of triangle is displayed?

a)

An acute triangle

b)

A right triangle

c)

An obtuse triangle

d)

All of the above

22.

If U is the triangle's height, which letter indicates the base?

a)

R

b)

S

c)

T

d)

All of the above

23.
Find the area of a figure that has a length of 3 and a width of 7.
a)
21 sq. units
b)
20 sq. units
c)
10 sq. units
d)
13 sq. units
24.
What is the area of the shaded triangle shown?
a)
24 square units
b)
36 square units
c)
18 square units
d)
6 square units
25.
Select the triangles that have an area of 8 square units.
a)
A, B, D, E
b)
A, B, D
c)
C, E
d)
A, C, E
26.
What is the formula for area of a triangle?
a)
A = bh
b)
A = bh/2
c)
A = b + h
d)
A = b - h
27.

Mrs. Artrip has two rectangular structures in her backyard. The dimensions of the pool are 5 feet by 6 feet. The dimensions of the fire pit are 7 feet by 8 feet. The length of the square backyard is 15 feet. What area of the yard is not covered by the hot tub and the fire pit?

a)

30 ft2

b)

56 ft2

c)

120 ft2

d)

139 ft2

28.

How would you find the area of this triangle?

a)

Multiply the length times the width of the triangle

b)

(1) Multiply the length of the base times the height of the triangle, then (2) divide by two

c)

Guess.

29.

My height has to be ______ to my base.

a)

parallel

b)

criss crossed

c)

perpendicular

d)

curved

30.
Which number represents the height?
a)
12
b)
13
c)
15
d)
14
31.
Area of triangle?
a)
17 units2
b)
20 units2
c)
10 units2
d)
16 units2

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