Make a rectangle. Long side = 62 inches. Short side = 40 inches. Draw a diagonal. Now use the Pythagorean theorem to solve for the diagonal (hypotenuse of the right triangle). C^2 = A^2 + B^2. C^2 = 62^2 + 40^2 C^2 = 3844 = 1600 C^2 = 5444 C = Square root of 5444 C = 73.8 The length of your cute Dwarf Japanese Maple is 6 feet (72 inches), so the tree will theoretically fit diagonally into your car.