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secondary 3 | E Maths | Fractions
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secondary 3 E Maths Fractions

How to do this question, thanks in advance

Date Posted: 6 years ago

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Darren Du Yu Heng

6 years ago

a) 5 square + 12 square = 13 square. so it's right-angled triangle. (Pythagoras' Theorem)
b) cosACD=cos (180-ACB)=-cosACB=-12/13
c) then use law of cosine to find MD.
MD square=CM square + CD square - 2 x CM x CD x cosACD

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Date Posted: 6 years ago

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