The Area of Triangle
The area of triangle ABC with the given measurement as shown in fig is '∆'. 's' is the semi-perimeter of the triangle such that 2s=().
We know, area of triangle is given by;
From Half-angle formula, we have,
We know, area of triangle is given by;
From Half-angle formula, we have,
1st Proof:
2nd Proof:
We have,
3rd Proof: