Question 752164
Find the area of a triangle with sides 6.4 km, and 8.9 km and included angle 63° ?

The solution requires the use of the Side Angle Side (SAS) formula for the area of a triangle:

SAS = (1/2)*(side1 * side2)*sine(angle)

SAS = (1/2)*(6.4 * 8.9) * sine(63)

SAS = (1/2)*(56.96)*(.89)

SAS = 28.48 * .89 =  25.3 square km