A square has 4 right angles and 4 equal sides. If you draw a diagonal through the square then you get two right triangles. So the area relation between a square and a right triangle is going to be half. The area of the triangle is half the area of the square.
Also the formula for area of a square is length times width. And the formula for the area of a right triangle is 0.5 times length times width.
So if you set up the equation (let's use * as multiplication symbol ):
Area of a Square : Area of a Right Triangle length * width : 0.5 * length * width (Divide by length * width on both sides) 1:0.5 or 2:1
