SSC CHSL 10 Jan 2017 Shift 2 Paper

In the given triangle, two angles are 30° and 90°, ⇒ Third angle = 60°
In a 30-60-90 triangle, the hypotenuse is always twice as long as the side opposite the 30° angle and the side opposite the 60° angle is $\sqrt{3}$ times as long as the side opposite the 30° angle.
The ratio of sides opposite 30°, 60° and 90° angles =1 :$\sqrt{3}$ : 2
Length of the side opposite the 90° angle = 6 cm
⇒ Length of side opposite the 30° angle $=\frac{6}{2}=3$ cm