Question

I NEED MATH HELP!!!

Answer 1

use law of sines and solve for C

Answer 2

Could u help me this

Answer 3

use the formula
1/2 abSinC

Answer 4

DelTaVsPi posted the triangle area formula. When you know 2 sides and the included angle, the area equals
Area = (1/2) * side 1 * sine (angle) * side2
Area = .5 * 7 * sine (40) * 12
Area = .5 * 7 * 0.64279 * 12
Area = 26.99718
So, it seems that 27.0 square meters is the answer.

And if you want to check that answer go here:
http://www.1728.org/triang.htm
scroll to the bottom and choose "Side Angle Side"