Find the area of the triangle ∆ABC in which a = 1, b = 2 and ∠c = 60o.
Given,
a=1, b=2 and ∠C=60°
By Cosine law,
2=1+4-c2
c2 =5-2
c2 =3
By Heron’s Law,
Area of Triangle,
sq. units