Trigonometry in RightAngled Triangles
Use trigonometric ratios in similar triangles to solve problems involving rightangled triangles (KS3)
Apply trigonometric ratios to find angles and lengths in rightangled triangles and in twodimensional figures (KS4) 
Teaching for Understanding
Resources and ideas to promote understanding
Blog Posts and Lesson Ideas
Teaching Trigonometry I (The Storeroom)
Tried and tested set of lessons for introducing trigonometry using similar triangles and trig. tables.
Tried and tested set of lessons for introducing trigonometry using similar triangles and trig. tables.
Fluency
Collections of standard practice problems in various formats
Worksheets
Basic practice worksheets (Worksheet Math)
Excellent comprehensive selection of worksheet generators, including basic calculator practice, problems using just an angle or side, problems using just one trigonometric ratio, and some good mixtures:
Trigonometry Introduction (Don Steward)
Label sides on triangles and write ratios.
Excellent comprehensive selection of worksheet generators, including basic calculator practice, problems using just an angle or side, problems using just one trigonometric ratio, and some good mixtures:
Trigonometry Introduction (Don Steward)
Label sides on triangles and write ratios.
WHiteboard Display
Coming soon.
Revision Resources
KESH Maths Takeaway (Link)
GCSE practice problems booklet (N.B. 1MAo specification)
GCSE practice problems booklet (N.B. 1MAo specification)
Enrichment, Extension and Problemsolving
Resources to extend thinking, enrich lessons or enhance problemsolving skills
Quick Puzzles and Problems
Calculate Angle Size (Don Steward)
A few problems using missing angles, includes four rightangled triangles but also isosceles triangle, rectangle, trapezium and sector.
A few problems using missing angles, includes four rightangled triangles but also isosceles triangle, rectangle, trapezium and sector.
Other Links and Resources
Useful stuff that doesn't fit anywhere else
Resource Bundles
Resource Collection (Stacy Brookes)
A huge collection of links to plenty of trigonometry resources.
A huge collection of links to plenty of trigonometry resources.
Interactives
Interactive unit circle (Maths is Fun)
Brilliant for demonstrating the link between trigonometry in right angled triangles, the unit circle and graphs of all three trigonometric functions.
Interactive triangle for trigonometry (Next Level Maths via TES)
Useful for generating problems to solve or just for demonstration to pupils.
Brilliant for demonstrating the link between trigonometry in right angled triangles, the unit circle and graphs of all three trigonometric functions.
Interactive triangle for trigonometry (Next Level Maths via TES)
Useful for generating problems to solve or just for demonstration to pupils.
CarD Sorts
Trigonometry loop cards (dsc505 via TES)
Two sets of loop cards to practise finding missing angles and sides using trigonometry. Set B is slightly harder than Set A. Excellent for finishing off the topic or as quick revision.
Two sets of loop cards to practise finding missing angles and sides using trigonometry. Set B is slightly harder than Set A. Excellent for finishing off the topic or as quick revision.
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