The following video from Yoga Journal teaches you how to properly practice Trikonasana, or Triangle Pose. When first learning how to do this pose, you may need to use a Yoga Block to maintain proper alignment. The goal is not to just touch the floor, but to maintain proper form while doing so. Placing a Yoga Block next to your shin and using that as your support helps. You may need to start with the block on it’s smaller edge first (at it’s tallest height), and then as you progress you can turn it onto it’s long edge or flat side to get closer to the ground. Eventually you’ll use your shin and then the floor. At each stage focus on the proper alignment of you knees, hips and spine. The strength, balance, and flexibility will come with practice.