00:01
So we have triangle a, b, c, and i'm just drawing for a place to put it, not to scale.
00:08
And i'm told that angle a is 82 degrees, angle c is 33 degrees, and side a is 18.
00:25
So i'm just going to use law of signs, and the sign of 82 degrees over 18 equals the sign of 33 degrees, over c.
00:41
Cross multiply.
00:46
Divide both sides by sine of 82 degrees.
00:51
And you're going to get your measure for side c, which is 9 .8998.
00:58
We want to round to the nearest 10th, so that'll be 9 .9 .9 units.
01:05
And the next problem, again, i have a triangle abc.
01:12
Let me straighten that on a little bit.
01:16
And in this case i'm given side a is 7, side b is 9, and side c is 4...