In case your trig isn't up to date, I found this right angle calculator that's very handy. Just put in any 2 sides or 1 side and 1 angle and it will tell you everything else you want to know.
RIGHT ANGLE CALCULATOR

It has a bunch of other calculators, too, but right angles are commonly used to build anything.

Thanks!

That's pretty neat! Thanks!

Used to do all the longhand trig, then got spoiled and lazy with the advent of AutoCad and computers.

Nice, thanks

We figure 45’s in plumbing by multiplying the offset x1.41. We figure 22 1/2’s by multiplying the offset by 2.82. This give you the travel piece between the fittings.

“SohCahToa”

3,4,5

Lived in a number of houses,

When I was younger I assumed the corners were right angles

How foolish I was..

^^^^^^^ this.

3,4,5 is fine if you want to be sure you have a square corner or have a need for a 37 or 53 degree angle. There are lots of other right triangles that aren't that simple.

a2+b2=c2

Soh Cah Toa

6-8-10

to get perfect triangles use m >n > 0 , such that a=2mn , b=m^2 -n^2 , then c2 is a perfect square

proof : https://en.wikipedia.org/wiki/Pythagorean_triple