people who are good at maths please help Watch

thatoneperson
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Sir Cumference
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(Original post by thatoneperson)
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Triangles BCD and ACE are similar - does that help? Please post all your working / ideas.
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artful_lounger
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Please post your working so far so the study helpers can advise you on whether you're on the right track and offer hints if not. Remember that the study help forum is not here to do your work for you, and the study helpers will only help guide you to the right answer, they won't post the working for you!
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Sharknado12
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You can use the given lengths to find a scale factor of the larger triangle compared to the smaller triangle. With this you should be able to find the length easily.
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