00:01
Okay, so i'm just going to roughly sketch out a triangle at an igelit, a, b, c.
00:10
Okay.
00:11
I have side a, so that's the side opposite angle a, side c, which is the side opposite angle c, and angle b.
00:22
When i have side angle side presentation, i can use an area formula that says one -half a -c, sign of b.
00:33
The letters don't matter.
00:34
I'm just matching them to this problem.
00:37
What you need are two sides, which i have, i have size 5 and 8, and the included angle.
00:44
So the angle that's formed by those two sides.
00:48
And then you can use the foreground.
00:50
So i have one half, five times eight times the sign of 125 degrees...