00:01
Hello, everyone, i hope all as well.
00:02
Today i'll be helping you with the 22nd problem of the model 3 test, and this question is asking, in triangle abc, angle b equals 42 degrees, angle c equals 30 degrees, and segment ab equals 100.
00:21
So from these angles, you can know, so i was saying a, b, c, so we know ab is 100.
00:31
Know this isn't going to be an equilateral triangle, and we know that it's not going to be a 90 -degree triangle, and we know that angle a, because it's 30 plus 42, equals 72, and then 180 minus 72, that would still be 108 degrees, so it's going to be an obtuse triangle.
00:56
All right.
00:56
So now when we go through this, we know we could use law of signs...