Angles, Triangles & Parallels

Geometry · O/L Maths

Angle relationships and reasoning about shapes.

sub-topics

• Angles and parallel lines
  Corresponding, alternate and co-interior angles.
• Angles of a triangle
  Interior and exterior angle properties.
• Angles of polygons
  Sum of interior and exterior angles.
• Congruent triangles
  Conditions for congruency and proving results.
• Parallelograms
  Properties and theorems about parallelograms.
• Similar figures
  Scale factors and similar triangles.