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The figure shows two right-angled triangles ABC and CDE, where AC = CDand angle BAC = 45 degree. Grace claims that if E is the mid-point of BC, then angle CDE = 0.5 times angle BAC. Do you agree with her? Explainyour answer briefly.
Help me plz~~~
F.2-F.3 Math (15marks)
2008-08-03 11:29 pm
回答 (1)
2008-08-03 11:40 pm
✔ 最佳答案
The figure shows two right-angled triangles ABC and CDE, where AC = CDand angle BAC = 45 degree. Grace claims that if E is the mid-point of BC, then angle CDE = 0.5 times angle BAC. Do you agree with her? Explain your answer briefly.No.
consider
tan∠CDE=EC/CD
tan∠CDE=1/2
∠CDE=26.565
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