Question 1032213
.
Use the formula for the triangle area 


S = {{{(1/2)*a*b*sin(alpha)}}},


where "a" and "b" are the dimensions of any two sides of a triangle and {{{alpha}}} is the angle between them


(see the lesson <A HREF=https://www.algebra.com/algebra/homework/Surface-area/Formulas-for-area-of-a-triangle.lesson>Formulas for area of a triangle</A> in this sie).