Question

If sides A and B of a triangle have lengths of 7 and 5 respectively, and the angle between them is `(3pi)/4`, then what is the area of the triangle?

Answer 1

Area = `12.38` Units

Explanation:

We know the Area of triangle where two sides and their included angle are given, is equal to `(Side1 * Side2 * sin (C)/2)` Where C is expressed in Radians.
`:. Area = 7*5*sin(3*pi/4)/2 or 7*5*sin(2.356)/2 or Area = 12.38` [Answer]