Question

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Answer 1

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Answer 2

Answer:

Here, Hypotenuse = 200m

The breadth of the river is nothing but Base of the triangle.

We know θ = 45°

Now, cosθ = Base/Hypotenuse

And, cos45 = 1/✓2

So,

$\cos(45) = \frac{base}{200}$

$\frac{1}{ \sqrt{2} } = \frac{base}{200}$

$\frac{200}{ \sqrt{2} } = base$

$base = 100 \sqrt{2}$

Hope it helps you!!