00:01
So in this problem, we want to solve the triangle.
00:03
And we're given an angle and aside.
00:06
So the first thing that we can do is solve for angle b.
00:09
And because we know that the angles inside of a triangle equal 180, and we already have 90 and 10, we can just subtract 90 and 10 from 180.
00:20
So we're going to do 180 minus 90 minus 10, which is equal to 80.
00:27
So 80 degrees is the measure of angle b.
00:32
Now what we're going to do is find side a.
00:36
And to find the side a, if we notice, side a is opposite the angle 10, and we also have the measurement of the side adjacent to the angle.
00:47
So we have opposite and adjacent, so we're going to be using tangent.
00:51
So tangent of the angle is equal to opposite over adjacent...