00:01
So in this problem, we're told that if we have a quadrilateral, which is a four -sided figure, we know that the sum of the measure of all of the angles would equal to 360.
00:09
So we're told that one of the angle measures would be x degrees, the second would be 3x degrees, and the third would be 5x degrees.
00:17
We want to express the measure of the fourth angle in terms of x.
00:21
Well, keep in mind when we add up these four angles, it should equal to 360.
00:25
Therefore, to find the measure of the fourth, we would take the total, which is 360, and subtract the other three angles, meaning we would subtract the first angle, which is x, then we would subtract the second angle, which is 3x, and then we subtract the third angle, which is 5x...