Ignatius Yeo's answer to Nancy's Secondary 2 Maths Singapore question.
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Firstly, calculate all the angles. To find length CD, apply sine rule.
One rule to remember is whenever there is a 45 degrees right-angle triangle, adjacent is always equal to opposite. In this case, to find length AB, we can find length AD since AB=AD. Hope it helps:)
One rule to remember is whenever there is a 45 degrees right-angle triangle, adjacent is always equal to opposite. In this case, to find length AB, we can find length AD since AB=AD. Hope it helps:)
Date Posted:
4 years ago
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