algebra

[TheBWoman]

What is the formula for getting the answer to this question.. You have a horizontal line, from that a vertical line, how do you get the measurement of the line joining at the angle beween the top of the vertical line to the base of the horizontal, please. :?:

 

[Denis]

Miss BW, do you know what a right triangle is?

If not, not much we can do for you here.