French Cleat- hang heavy items onto walls. A single piece of wood is split in two at a angle. Alternatively, two pieces of wood are cut at angles to fit one on top of the other. Use a French cleat for mounting shelves and bookcases on a wall.
Picture frames and boxes require joining two boards to create a right angle. The cleanest way to do that is cutting 45 degree angles at the end of each board, called a miter cut. Here’s the formula to determine the length each of your boards should be cut.
Works out your lower abs, transverse abdominals & obliques. Anchor your feet, lean back at a 45 degree angle, then slowly twist your torso & keep control. With 20 lbs curl bar but you can use dumbbells & rest them on your shoulder.