Geometry
# Solving Triangles

Given a triangle with one angle of \(90^\circ,\) the triangle is called a right angled triangle and the side opposite the right angle is called the hypotenuse. The side opposite the angle \(\theta\) in the above diagram is called the opposite side and the remaining side is called the adjacent side. If \(\theta=20^\circ\) and the length of the hypotenuse is \(81\) cm, what is the length of the opposite side in cm?

**Note:** The above diagram is not drawn to scale.

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