Lesson deck
Geometry & measuresHigher
The cosine rule
Pythagoras at 90° first, then two sides and the angle between them, with a box for every number in the formula. Then an obtuse angle, an angle from three sides, a problem in context and a perimeter.
A free GCSE Higher geometry and measures lesson on the cosine rule, spec code G22. It has a lesson deck to teach from with a visualiser, a worksheet with answers, a puzzle, an exit ticket, an end of unit test and a method video.
Higher
The cosine rule
Exit ticket
The cosine rule
Puzzle
Code breaker:Sine and cosine rules
Test
Further trigonometry test:Higher
Method video
Sine and cosine rules
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