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Area of triangle and trapezoid - Printable Mathematics Worksheets - Wayground

Area of triangle and trapezoid

20 questions

7th - 7th Grade

Mathematics

This Grade 7 mathematics worksheet gives students focused practice finding the area of triangles and trapezoids. Across 20 multiple-choice questions, students identify the triangle area formula, apply A = 1/2bh to calculate areas from given measurements, and select answers with appropriate square units. The worksheet also includes trapezoid area problems using pairs of bases and a height. The questions progress from recognizing formulas to solving numerical area problems, helping students connect the structure of each shape to the calculation they use. Multiple-choice distractors make it possible to identify errors such as using the full base-height product, adding side lengths, or reporting linear rather than square units. This free printable worksheet is designed for Grade 7 math practice, independent work, review, or a quick check for understanding, and it includes a complete answer key for efficient checking.

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Worksheets

Area of triangle and trapezoid

Total questions: 20

Name
Class
Date
1.

How do you find the area of a triangle?

a)

base x height

b)

take half of the base times the height

c)

add up all of the sides

2.

What is the formula for the area of a triangle?

a)

A = 1/2 bh

b)

A = bh

c)

A = s + s + s

3.

Find the area of the triangle.

a)

10 cm2

b)

24 cm2

c)

12 cm2

4.

Find the area of the triangle.

a)

30 m2

b)

60 m2

c)

16 m

d)

30 m

5.

Find the area of the triangle.

a)

11 cm2

b)

15 cm2

c)

30 cm2

6.

Find the area of the triangle.

a)

36

b)

72

c)

36 units2

d)

72 units2

7.

Find the area of the triangle.

a)

20 in

b)

40 cm2

c)

13 cm2

d)

20 cm2

8.

Find the area of the triangle.

a)

5 cm2

b)

10 cm2

c)

7 cm2

9.

Find the area of the triangle.

a)

96 in2

b)

48 in2

c)

20 in2

10.

Find the area of the triangle.

a)

56 in

b)

168 in2

c)

84 in2

d)

175 in

11.
Find the area of the figure
a)
30 cm2
b)
44 cm2
c)
88 cm2
d)
22 cm2
12.
Find the Area:
a)
84 m2
b)
168 m2
c)
112 m2
d)
56 m2
13.
Find the Area.
a)
91 ft2
b)
77 ft2
c)
78 ft2
d)
105 ft2
14.
Find the area of a trapezoid with bases of 3 in and 7 in, with a height of 6 in?
a)
60 in2
b)
32 in2
c)
30 in2
d)
36 in2
15.
Find the area of a trapezoid with bases of 6 feet and 10 feet, and with a height of 6 feet?
a)
60 feet2
b)
36 feet2
c)
32 feet2
d)
48 feet2
16.
What is this polygon called?
a)
Parallel
b)
Triangle
c)
Trapezoid
d)
Square
17.

What is the formula used to find the area of this shape? *This symbol: / means divided by

a)

A= b x h/2

b)

A= s2

c)

A= l x w

d)

A= (b1 +b2)h/ 2

18.
a)
6 in
b)
9 in
c)
6 in2
d)
9 in2
19.

Find the area of this trapezoid.

a)

26 ft2

b)

20 ft2

c)

52 ft2

d)

40 ft2

20.
a)
108 ft2
b)
54 ft2
c)
42 ft2
d)
63 ft2
Answer Key

Area of triangle and trapezoid

Total questions: 20

1.
b)

take half of the base times the height

2.
a)

A = 1/2 bh

3.
c)

12 cm2

4.
a)

30 m2

5.
b)

15 cm2

6.
c)

36 units2

7.
d)

20 cm2

8.
a)

5 cm2

9.
b)

48 in2

10.
c)

84 in2

11.
c) 88 cm2
12.
a) 84 m2
13.
c) 78 ft2
14.
c) 30 in2
15.
d) 48 feet2
16.
c) Trapezoid
17.
d)

A= (b1 +b2)h/ 2

18.
c) 6 in2
19.
a)

26 ft2

20.
b) 54 ft2

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FAQs

What does the Area of triangle and trapezoid worksheet cover?

This Grade 7 math worksheet uses 20 multiple-choice questions to build fluency with triangle and trapezoid area. Students identify A = 1/2bh, calculate triangle areas from measurements, and solve trapezoid problems using two bases and a height while selecting answers with square units.

How can I use this worksheet to teach triangle and trapezoid area?

Begin by reviewing why a triangle’s area is half the product of its base and height, then model one calculation with the units written as square units. Next, compare that process with trapezoid problems: students should average the two bases before multiplying by the height. Use the multiple-choice options to ask students which incorrect step could produce each distractor.

What mistakes should I watch for when students complete this area worksheet?

Watch for students using bh instead of 1/2bh on triangle items, adding side lengths as if finding perimeter, or choosing an answer with linear units instead of square units. In the trapezoid questions, students may use only one base or fail to average the two bases before multiplying by the height. They should also check that the final unit is squared.

How do I assign and grade this triangle and trapezoid area worksheet?

Wayground provides this worksheet as a printable PDF and as a digital quiz, with a complete answer key for all 20 multiple-choice questions. You can grade printable submissions by scanning student work with the Wayground for Teachers app, or review responses from the digital quiz.

How can I differentiate this triangle and trapezoid area worksheet for my students?

Use the worksheet’s Advanced Settings to adjust font spacing and font size so the formula and measurement-based multiple-choice items are easier to read. You can also apply a dyslexia-friendly font or translate the worksheet into another language when that supports access to the area questions.

Where can I find more worksheets like this on Wayground?

Wayground offers a broad collection of free printable worksheets and practice problems across subjects, with downloadable PDFs and answer keys to support essential skills and concepts. Browse more resources at https://wayground.com/en-us/worksheets.

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