Use coordinates to compute perimeters of polygons and areas of triangles and rectangles, e.g., using the distance formula.

How Do You Find the Distance Between Two Points?

Trying to find the distance between two points? Use the distance formula! Want to see how it's done? Check out this tutorial!
How Do You Find the Perimeter of a Rectangle in the Coordinate Plane?

Finding the perimeter of a rectangle in the coordinate plane is easier than you might think! This tutorial shows you how to use the coordinate plane to find the perimeter of a rectangle.
How Do You Find the Area of a Rectangle in the Coordinate Plane?

If you need to find the area of a rectangle on the coordinate plane, all you need is the length and width of that rectangle! This tutorial shows you what to do to find the area of a rectangle when it's graphed on the coordinate plane.
How Do You Find the Area of an Irregular Figure in the Coordinate Plane?

Finding the area of a composite figure in the coordinate plane is easier than you might think! Follow along with this tutorial to see the process step-by-step.