Question

The perimeter of a rhombus is 20 cm and one of its
diagonal 6 cm long. Find the length of the other
diagonal
यदि समचतुर्भुज का परिमाप 20 cm है तथा उसके एक विकर्ण की
लम्बाई 6 cm है तो दूसरे विकर्ण की लम्बाई क्या होगी-
A) 8 cm (B)9 cm (C) 10 cm (D) 11 cm

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Answer 1

Answer:

Step-by-step explanation:

Perimeter = 20 cm.

Let a  be the side of rhombus

4a =20

a = 20/4

a⇒5 cm

NOW USING THE PHYTHAGORUS THEORAM

diagonals of rhombus bisect each other at 90

hypotenuse²=height²+base²

25=9+base²

25-9⇒base²

16⇒base²

√16⇒base

4⇒base

second diagonal is ⇒4+4 cm

                               ⇒8 cm

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