The Area Of A Triangle:

Given any triangle:

If two sides, A and C, are given and the included angle b then the area of the triangle is :

Area = ½ AC sin b

If all three angles and a side of a triangle are given, then the area of the triangle is:

If all three sides are known and the semiperimeters,
[ s = ½ (A + B + C)] then the area is :