For side angle pose, begin from Reverse Warrior. Drop the front arm to rest the elbow on the thigh. Extend the back arm up overhead, next to your ear. You want to look like a diagonal line from your extended back leg all the way up through your fingertips. Feel a nice stretch through your side body of your extended arm. Remember, your bent knee should still be directly over your ankle or slightly behind!
For extended side angle, drop the front arm down to the ground in front of and in line with the bent front leg and place your fingers on the ground. Everything else from side angle applies here! Don’t let the upper shoulder drop forward towards the ground. Imagine you are stuck between two boards to keep everything aligned properly.