# Coordinate Geometry

### By Dontel Banice

## What is a Coordinate Geometry

**Is study of geometry using coordinate system this contrast with synthetic geometry.**

## When developing a coordinate geometry proof

**draw and label the graph****state the formulas you will be using****show ALL work (if you are using your graphing**

**calculator, be sure to show your screen displays as**

part of your work.)

part of your work.)

**have a concluding sentence stating**

**what you have proven and why it is true.**

The Coordinate Plane

## An example

Read the question carefully. The word** trapezoid,** by definition, tells you that you are looking for a figure with ONLY ONE set of

**sides. Lines are parallel when they have the same**

*parallel***. You will use the Slope Formula.**

*slope*Draw a neat, labeled graph for the problem.

State the formula that you will be using.Be sure to state the connection between the slopes and the sides being parallel or non-parallel.

End with a concluding sentence stating WHY you know the figure is a trapezoid.