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Introduction to plane geometry

From the AMSI ‘The Improving Mathematics Education in Schools (TIMES)' project, this module is for teachers who wish to consolidate their content knowledge on the topic of two-dimensional geometry. It looks at parallel lines, points, angles and the angle sum of a triangle. There are sections on the history, the context and exercises, as well as examples on how to present and explain the concepts to students.

Additional details

Year level(s) Year 7
Audience Teacher
Purpose Content knowledge
Format Web page
Teaching strategies and pedagogical approaches Explicit teaching
Keywords Angle, Parallel lines, Point, Line

Curriculum alignment

Curriculum connections Critical and creative thinking, Numeracy
Strand and focus Space
Topics Angles and geometric reasoning
AC: Mathematics (V9.0) content descriptions
Solve problems involving the area of triangles and parallelograms using established formulas and appropriate units

Identify corresponding, alternate and co-interior relationships between angles formed when parallel lines are crossed by a transversal; use them to solve problems and explain reasons


Demonstrate that the interior angle sum of a triangle in the plane is 180° and apply this to determine the interior angle sum of other shapes and the size of unknown angles

Numeracy progression Understanding geometric properties (P6)
Understanding units of measurement (P9)

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