Coordinates in Four Quadrants
This lesson extends students' knowledge of coordinates from the first quadrant to all four quadrants. Students will learn to read and plot coordinates involving negative numbers, understand the structure of the Cartesian plane, and use these skills to identify geometric shapes and calculate distances.
Learning objectives
- Describe positions on a full coordinate grid (all four quadrants).
- Plot specified points and draw sides to complete a given polygon.
- Calculate distances between points with the same x or y coordinate in different quadrants.
Lesson plan (60 minutes)
Introduction · 10 min
Starter: Recalling coordinates in the first quadrant. Plotting (2,3) and (5,1) on a mini-whiteboard.
Main Teaching · 15 min
Teacher instruction: Introduce the four quadrants, the origin, and negative axes. Walk through the worked example.
Independent Practice · 20 min
Differentiated Activity: Students complete Support, Core, or Stretch worksheets based on prior attainment.
Plenary · 15 min
Review and Quiz: Go through common errors from the worksheets and complete the 8-question MCQ quiz.
Key vocabulary
- x-axis
- The horizontal axis on a coordinate graph.
- y-axis
- The vertical axis on a coordinate graph.
- Origin
- The point (0,0) where the x-axis and y-axis cross.
- Quadrant
- One of the four sections of a coordinate plane divided by the axes.
- Coordinates
- A pair of numbers used to locate a point (x, y).
Core worksheet (first questions)
- Point A is 4 units left and 5 units up. Write its coordinates.
- Point B is 5 units right and 3 units down. Write its coordinates.
- Point C is 2 units left and 6 units down. Write its coordinates.
- Point D is 3 units left and stays on the x-axis. Write its coordinates.
Quiz (sample)
1. In what order do we read coordinates?
- A. y-axis then x-axis
- B. x-axis then y-axis
- C. Alphabetical order (y then x)
- D. Largest number first
2. What are the coordinates of the origin?
- A. (1, 1)
- B. (0, 1)
- C. (1, 0)
- D. (0, 0)
3. Which quadrant has negative x-values and positive y-values?
- A. First Quadrant
- B. Second Quadrant
- C. Third Quadrant
- D. Fourth Quadrant
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