Four loads. Not for sale yet.
One truss joint
One joint. A member up-left on a 3-4-5 slope, a member to the right, and a load straight down. Both members are in tension when the joint is still.
That's the four.
A full triangle, joint by joint, is coming. Not for sale yet.
Mechanics Map, the method of joints. CC BY-SA 4.0. This page links that chapter and does not copy it. The drawing is original.