Starter 3 x quiz type questions, students answer a,b,c, or d maybe on mini whiteboards
Slide 6 and 7 – model LHS in each case, leave on the board and they do RHS
Slide 8 – questuions for them to do Differentiated 1 star easier, 2, then 3 get harder then answers
Slide 10 – 11 model use of cosine rule with area, then one for them, with answers
Slide 13 – harder extension one with answers
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