Geometry: Angles and Triangles · Geometry

Angles on a Line and at a Point

Finding unknown angles using the properties of adjacent angles, vertically opposite angles, and angles at a point.

Key Questions

  1. 1How can we prove that the sum of angles on a straight line is always 180 degrees?
  2. 2What is the relationship between vertically opposite angles formed by intersecting lines?
  3. 3How can we use known angle properties to find multiple unknown angles in a complex diagram?

MOE Syllabus Outcomes

MOE: Geometry - P5
Level: Primary 5
Subject: Mathematics
Unit: Geometry: Angles and Triangles
Period: Geometry

Suggested Methodologies

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