# Lesson Plan: Midpoint on the Coordinate Plane Mathematics

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to find the coordinates of a midpoint between two points on a horizontal or vertical line or those of an endpoint on the coordinate plane.

#### Objectives

Students will be able to

• calculate the coordinates of a midpoint between two coordinates, where both coordinates lie on a horizontal or vertical line,
• find the coordinates of an endpoint given the midpoint and the other endpoint, where both coordinates lie on a horizontal or vertical line,
• solve problems in a context involving the midpoint and endpoints in the coordinate plane.

#### Prerequisites

Students should already be familiar with

• plotting and reading coordinates in all four quadrants,
• properties of polygons.

#### Exclusions

Students will not cover

• the midpoint formula,
• the midpoint of coordinates that are not both horizontal or vertical,
• midpoints of coordinates in the 3D plane,
• the equation of the perpendicular bisector of two coordinates,
• the gradient of the line passing through two points.