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Grade 7 - Mathematics
9.18 Perimeter of a Quadrilateral

Example:
The sides of a quadrilateral ABCD are 5 cm, 6 cm, 9 cm and 8 cm. Find its perimeter.

Solution:
Perimeter of the Quadrilateral (P) = S1 + S2 + S3 + S4
Where P is the perimeter of the quadrilateral and S1, S2, S3 and S4 are the sides of the quadrilateral.
Given that,
S1 = 5 cm, S2 = 6 cm, S3 = 9 cm and S4 = 8 cm.
Hence P = 5 + 6 + 9 + 8
P = 28 cm.


Directions: Read the above example carefully and answer the following questions. Also draw 10 different quadrilaterals and find their perimeters.
Q 1: The sides of a quadrilateral ABCD are 2564 cm, 1235 cm, x cm and 1250 cm. Find x if its perimeter is given by 6618 cm.
1258 cm
1548 cm
1238 cm
1569 cm

Q 2: The sides of a quadrilateral ABCD are (x + y) cm, (x - y) cm, (z + w) cm and (z - w) cm. Find its perimeter.
(2y + 2w) cm
(2x + 2z) cm
(2y + 2z) cm
(2x + 2y) cm

Question 3: This question is available to subscribers only!

Question 4: This question is available to subscribers only!


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