NDA Math Circle

Concept:
Length of chord =2r‌sin(‌

θ

2

)
Where r is the radius of the circle and θ is the angle from the center of the circle to the two points of the chord.
Calculation:
Given: r=1 and angle =120∘
Now, Length of chord
‌‌=2(1)‌sin(‌

120∘

2

)
‌‌=2‌sin(60∘)
‌‌=2×‌

√3

2

‌‌=√3‌ units ‌