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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 9

The lengths of the diagonals of a Rhombus are 12 cm and 16 cm. Find the side of the rhombus - Mathematics

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Question

The lengths of the diagonals of a Rhombus are 12 cm and 16 cm. Find the side of the rhombus

Sum

Solution

Since the diagonals of a rhombus bisect each other at right angles

AO = `1/2` AC = `1/2 xx 12` = 6 cm

BO = `1/2` BD = `1/2 xx 16` = 8 cm

In the right triangle AOD

AD2 = AO2 + DO2

= 62 + 82

= 36 + 64

= 100

∴ AD = `sqrt(100)`

= 10

∴ AB = BC = CD = AD = 10 cm.

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Chapter 4: Geometry - Exercise 4.2 [Page 157]

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Samacheer Kalvi Mathematics [English] Class 9 TN Board
Chapter 4 Geometry
Exercise 4.2 | Q 4 | Page 157
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