德望學校 – S3數學 3A Chapter 3 Special Lines and Centres in a Triangle – CQ (13-18)

試卷答案:

1. a) 45°
   b) –
2. I don’t agree with Mary that the perimenter is 12cm.
   I agree with Mary that the perimeter is 15cm.
3. x = 130°, y = 40°
4. a) –
   b) –
5. a) –
   b) 6.25 cm
   c) A
6. a) –
   b i) C
     ii) K
   c) –
7. a) –
   b i) 8 cm
     ii) 5 cm
8. a) 20 cm
   b) Q
   c) No, I don’t agree.
9. a) –
   b) I agree with the claim.
   c) –
10. Only one type of triangle can be formed.  I disagree with the claim.
11. a) 22.5°
    b) B
    c) 2.93
12. I disagree with his claim.
13. a) ∠BIC = 180° – b/2 – c/2
    b) –
14. 90°
15. a) –
    b) I agree with the claim.

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