Summary

• Description:

  The MS Word document comprises Grade 9 Rationalized Mathematics Notes specifically for Strand 4.0: Geometry. A PDF version is also available upon request.

  These notes focus on geometrical concepts including coordinates and graphs, scale drawing, similarity and enlargement, and trigonometry, relevant to the Grade 9 Mathematics curriculum. The document covers multiple sub-strands within Strand 4.

  The document covers the following strand and sub-strands:

  • Strand 4.0: Geometry
    • Sub-Strand 4.1: Coordinates and Graphs
      • Cartesian Plane (x-axis, y-axis, origin)
      • Plotting Points
      • Drawing a Straight-Line Graph (from linear equations)
      • Parallel Lines (Same gradient)
      • Perpendicular Lines (Negative reciprocal gradients)
      • Gradient of a Line (Steepness, formula)
      • Real-Life Applications of Straight-Line Graphs (Roads, ramps, tracking motion)
    • Sub-Strand 4.2: Scale Drawing
      • Compass and True Bearings (N, E, S, W, NE, SE, SW, NW; angles from North)
      • Determining Bearings
      • Locating a Point Using Bearing and Distance
      • Angles of Elevation (Looking upward)
      • Angles of Depression (Looking downward)
      • Using Scale Drawings (Ratio to real life, e.g., 1 cm : 1 m)
      • Steps for Scale Drawing
      • Applications of Scale Drawing (Maps, house plans, surveying)
    • Sub-Strand 4.3: Similarity and Enlargement
      • Similar Figures (Same shape, different sizes, equal corresponding angles, proportional sides)
      • Properties of Similar Figures
      • Drawing Similar Figures
      • Enlargement (Making shape bigger/smaller, scale factor, centre of enlargement)
      • Properties of Enlargement
      • Linear Scale Factor (Ratio of corresponding sides)
      • Applications in Real Life (Architecture, maps, photography, art, engineering)
    • Sub-Strand 4.4: Trigonometry
      • Right-Angled Triangle (Hypotenuse, Opposite, Adjacent sides)
      • Trigonometric Ratios (Sine, Cosine, Tangent - SOH CAH TOA)
      • Using Tables or Calculators (sin, cos, tan values for angles 0°-90°)
      • Solving Right-Angled Triangles (Finding missing sides or angles)
      • Real Life Applications (Surveying, navigation, construction, design)

  The document provides introductions, definitions, formulas, steps, examples, and real-life applications for each geometrical concept, supported by diagrams and emphasizing practical understanding.

• File Size:

  730.66 KB
• Length:

  16 pages
• Category:

  Lesson Notes
• Level:

  Grade 9
• Subject:

  MATHEMATICS
• Posted By:

  Caleb_Peter

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