High school math

Susannah and Peter dug the holes for the new greenhouse today.

My high school trig teacher was awesome, and I thought of her today. In connection with building the new greenhouse, Peter asked me how to figure out the angle of a right triangle where you know the length of the two sides adjoining the right angle. In this case, the two sides are 4 and 10. With some help from this page, I was able to figure out the angles (21.8 and 68.2). I even still had my old high school trig calculator.