Question

In a parallelogram the length of two sides
and one diagonal are 7 cm, root23 cm and
6 cm respectively. Find the length of the
other diagonal.​

Answer 1

Answer:

Given, two sides of parallelogram are 6 and 8 and one diagonal 7.

cosθ=

2×6×8

6

2

+8

2

−7

2

=

96

36+64−49

=

96

51

Now let the other diagonal length be a

We have a

2

=6

2

+8

2

−96cos(180−θ)=100+51=151

⇒a=

151

Step-by-step explanation:

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