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Introducing trigonometry

In this series of lessons, students will explore the relationships between the sides and angles of right-angled triangles. Students will measure similar triangles to find the trigonometrical ratios. The resources includes teacher notes and student activities.

Additional details
Year level(s)	Year 9
Audience	Teacher
Purpose	Student task, Teaching resource, Content knowledge
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	New Zealand Ministry of Education
Copyright	© New Zealand Ministry of Education. Creative Commons BY 3.0 NZ.