Puzzle
Geometry & measuresPuzzle
Code breaker:Sine and cosine rules
Thirteen triangles drawn to scale and mixed up, so students choose the sine rule, the cosine rule or ½ab sin C each time: sides, angles, areas, one area worked backwards and one that needs two rules. Some are turned round. One per A4.
A free GCSE geometry and measures puzzle with answers, spec codes G22 and G23. It goes with the lessons on the cosine rule, sine rule: finding a side, area of a triangle: ½ab sin C and sine rule: finding an angle.
Lesson
The cosine rule
Lesson
Sine rule:Finding a side
Lesson
Area of a triangle:½ab sin C
Lesson
Sine rule:Finding an angle
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