Find the area of the triangle B = 104°, a = 11 cm, c = 18 cm

Question

nincompoop · Answer

Area = (ac*sinC)/2

anonymous · Answer

very good nin.

nincompoop · Answer

did I interrupt what you were typing, @genius12 ?
sorry!

anonymous · Answer

no lol thats what i was typing except with a small explanation =P

nincompoop · Answer

oh yah I was going into details to show the relationship of that area formula with 1/2(bh)

nincompoop · Answer

but I have to study for my test tomorrow :P you can do that part for me 
medal in advanced!

anonymous · Answer

i'll wait until OP requests for an explanation lol.. @nincompoop

anonymous · Answer

in order to take the sin of C i have to find C. how do i do that?

nincompoop · Answer

my bad I meant sinB

anonymous · Answer

Oh okay. Thank you

anonymous · Answer

B* is already given. it's 104°. The area of a generic triangle is given by the length of 2 sides and the angle between them multiplied by 1/2. Here we're given the sides 'a' and 'c' and the angle between them is B = 104°. So it's (1/2)(ac)sin(104°)

anonymous · Answer

I understand now. thanks!