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Introduction to trigonometry

These lesson plans guide the teacher on how to introduce trigonometry to students through an investigation of similar triangles.

Additional details
Year level(s)	Year 9
Audience	Teacher
Purpose	Teaching resource, Student task
Format	Web page
Teaching strategies and pedagogical approaches	Mathematics investigation
Keywords	Pythagoras, Hypotenuse, Adjacent, Opposite, Tangent, Cosine, Sine, Angle, Ratio, Similar, Trigonometry, Right-angled triangle
Curriculum alignment
Curriculum connections	Critical and creative thinking, Numeracy
Strand and focus	Space
Topics	Pythagoras and trigonometry
AC: Mathematics (V9.0) content descriptions	AC9M9SP02 Apply the enlargement transformation to shapes and objects using dynamic geometry software as appropriate; identify and explain aspects that remain the same and those that change AC9M9M03 Solve spatial problems, applying angle properties, scale, similarity, Pythagoras' theorem and trigonometry in right-angled triangles
Numeracy progression	Proportional thinking (P7) Understanding geometric properties (P7) Understanding units of measurement (P10)
Copyright details
Organisation	BetterLesson
Copyright	© Beth Menzie. Creative Commons BY-NC 4.0.