23-03-2018
Mathematics

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Please help me on these questions and explain it thanks

Please help me on these questions and explain it thanks class=

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MeganLouise MeganLouise

23-03-2018

ABC = 180-120=60
ACB = 180-(40+60)=80
Therefore ECD= 80 as ACB and ECD are vertically opposite angles

the solution is A as that is where the graphs intersect each other

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