We will use the ratio of tanget which is the opposite over the adjecent
The opposite side of angle B is 6
The adjecent side of angle B is 8
Since you are trying to find angles we will use the universe trig functions
![\tan {}^( - 1) ( (6)/(8) ) = 36.9](https://img.qammunity.org/2019/formulas/mathematics/high-school/n9mx3acege2strrrvsz9cgvpbarz5bd5js.png)
The measurementof angle B is 36.9 degrees.