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Triangles: Finding Their Areas

In this worksheet, students calculate the area of a triangle by considering it as half of a rectangle.

'Triangles: Finding Their Areas' worksheet

Key stage:  KS 2

Curriculum topic:  Measurement

Curriculum subtopic:  Calculate Areas

Difficulty level:  

down

Worksheet Overview

QUESTION 1 of 10

In this worksheet, we will learn about the area of triangles.

 

For example:

In the following figure, find the area of the shaded triangles.

Area of triangles

Find the shaded area of this triangle.

Triangle area 2 x 6

The shaded area is __________ cm2

Find the shaded area of this triangle.

Area of triangle 7 x 20

The shaded area is __________ cm2

Find the shaded area of this triangle.

Area of triangle 16 x 5

The shaded area is __________ cm2

Find the shaded area of this triangle.

Area of triangle 15 x 18

The shaded area is __________ cm2

Find the shaded area of this triangle.

Area of triangle 8 x 9

The shaded area is __________ cm2

Find the shaded area of this triangle.

Area of triangle 20 x 5

The shaded area is __________ cm2

Find the shaded area of this triangle.

Area of triangle 10 x 3

The shaded area is __________ cm2

Find the shaded area of this triangle.

Area of triangle 13 x 5

The shaded area is __________ cm2

Find the shaded area of this triangle.

Area of triangle 17 x 13

The shaded area is __________ cm2

The area of this rectangle is 100 cm².

Area of triangle 20 x 5

Find the area of the shaded triangle.

  • Question 1

Find the shaded area of this triangle.

Triangle area 2 x 6

The shaded area is __________ cm2

CORRECT ANSWER
6
EDDIE SAYS
6 x 2 = 12

12 ÷ 2 = 6

  • Question 2

Find the shaded area of this triangle.

Area of triangle 7 x 20

The shaded area is __________ cm2

CORRECT ANSWER
70
EDDIE SAYS
20 x 7 = 140

140 ÷ 2 = 70

  • Question 3

Find the shaded area of this triangle.

Area of triangle 16 x 5

The shaded area is __________ cm2

CORRECT ANSWER
40
EDDIE SAYS
16 x 5 = 80

80 ÷ 2 = 40

  • Question 4

Find the shaded area of this triangle.

Area of triangle 15 x 18

The shaded area is __________ cm2

CORRECT ANSWER
135
EDDIE SAYS
18 x 15 = 270

270 ÷ 2 = 135

  • Question 5

Find the shaded area of this triangle.

Area of triangle 8 x 9

The shaded area is __________ cm2

CORRECT ANSWER
36
EDDIE SAYS
9 x 8 = 72

72 ÷ 2 = 36

  • Question 6

Find the shaded area of this triangle.

Area of triangle 20 x 5

The shaded area is __________ cm2

CORRECT ANSWER
50
EDDIE SAYS
20 x 5 = 100

100 ÷ 2 = 50

  • Question 7

Find the shaded area of this triangle.

Area of triangle 10 x 3

The shaded area is __________ cm2

CORRECT ANSWER
15
EDDIE SAYS
10 x 3 = 30

30 ÷ 2 = 15
  • Question 8

Find the shaded area of this triangle.

Area of triangle 13 x 5

The shaded area is __________ cm2

CORRECT ANSWER
32.5
EDDIE SAYS
13 x 5 = 65

65 ÷ 2 = 32.5

  • Question 9

Find the shaded area of this triangle.

Area of triangle 17 x 13

The shaded area is __________ cm2

CORRECT ANSWER
110.5
EDDIE SAYS
17 x 13 = 221

221 ÷ 2 = 110.5

  • Question 10

The area of this rectangle is 100 cm².

Area of triangle 20 x 5

Find the area of the shaded triangle.

CORRECT ANSWER
50
EDDIE SAYS
100 ÷ 2 = 50
---- OR ----

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