### Home > AC > Chapter 2 > Lesson 2.1.3 > Problem 2-31

Plot the points , and

*on a set of axes. Use a ruler to connect them in order, including*

*back to*

*, to form a quadrilateral (a shape with four sides).*

*2-31 HW eTool*(Desmos)

What kind of quadrilateral was formed?

A quadrilateral is any closed, four-sided figure.

The type of quadrilteral is determined by the angles and the side lengths.

Examples are rectangles, squares, and trapezoids.How long is each side of the quadrilateral?

units What is the area of the quadrilateral?

Use your answers from parts (a) and (b) to find and complete the area formula.

What is the perimeter of the quadrilateral?

Add the lengths of each side.

Use the eTool below to help you with this problem.

Click on the link at right for the full eTool version: *2-31 HW eTool* (Desmos)