Question

In a rectangle ABCD AB=20cm angle BAC=60 degree then find the length of the side AD

Answer 1

Since, ABCD is a rectangle,
therefore, AB=CD and BC=AD

Given,AB=20cm
angle BAC=60°

Now,
$\tan(60) = \frac{bc}{ab} \\ = > \sqrt{3} = \frac{bc}{20} \\ = > bc = 20 \sqrt{3}$
Since, AD=BC
therefore, AD= 20√3 cm

Hope you understood.
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Answer 2

Answer:20 root3

Step-by-step explanation:

Since EFGH is a rectangle

therefore,AB=CD and BC=AD

Given AB=20 cm

angle BAC=60°

Now tan 60°=BC/AB

root3=BC/20

BC=20 root3

Since AD=BC

so AD=20 root3

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