A right triangle, three sides are 3 4 5, why is the smallest angle degree 37 degrees

A right triangle, three sides are 3 4 5, why is the smallest angle degree 37 degrees

If you know the three sides of a triangle, the triangle is determined
According to the principle of big side to big angle and small side to small angle, we know that the minimum angle must be the angle corresponding to side length 3
Then we know the angle according to the triangle theorem. We know it from arcsin 3 / 5 = 37 degrees
Do not know what grade you are, junior three should have. But our teachers want us to remember this angle