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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 7 - Mathematics
9.19 Perimeter of the Triangle

Example:
The sides of the triangle ABC are 12 cm, 5 cm and 9 cm. Find its perimeter.

Example:
Perimeter of the triangle (P) = S1 + S2 + S3
Where P is the perimeter of the triangle, S1, S2 and S3 are the sides of the triangle.
Given that,
S1 = 12 cm, S2 = 5 cm and S3 = 9 cm.
Hence P = 12 + 5 + 9
i.e P = 26 cm.
Therefore, the perimeter of the given triangle is 26 cm.


Directions: Read the above example carefully and answer the following questions. Also draw 10 different triangles, measure their angles and find their perimeters.
Q 1: The sides of the triangle ABC are 6 cm and 9 cm. Find the remaining side if its perimeter is given by 25 cm.
20 cm
10 cm
15 cm
35 cm

Q 2: The sides of the triangle ABC are 28 cm, 29 cm and 32 cm. Find its perimeter.
89 cm
79 cm
45 cm
99 cm

Q 3: The sides of the triangle ABC are 142 cm, 182cm and 192 cm. Find its perimeter.
844 cm
881 cm
829 cm
831 cm

Q 4: The sides of the triangle ABC are 7 cm, 8 cm and 10 cm. Find its perimeter.
30 cm
15 cm
25 cm
20 cm

Q 5: The sides of the triangle ABC are (x + 4) cm, (x + 8) cm and (x + 7) cm. Find 'x' if its perimeter is given by 70 cm.
18 cm
17 cm
20 cm
19 cm

Q 6: The sides of the triangle ABC are 8 cm, 82 cm and 83 cm. Find its perimeter.
584 cm
526 cm
528 cm
522 cm

Question 7: This question is available to subscribers only!

Question 8: This question is available to subscribers only!


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