A quadratic equation can be solved in multiple ways including. Each set of parallel lines has the same length. The area of rectangle A is its length multiplied by its width or 3 x.
Now that youve used the Pythagorean Theorem to find the second side length you can solve for the area.
Step 2Define all of the variables. Step 2Define all of the variables. To solve problems with rectangles we will first draw a picture to represent the problem and use the picture to set up our equation. The area of a rectangle can be calculated by multiplying the width by the length.