德望學校 – S2數學 2B Chapter 9 Pythagoras Theorem – CQ (16-21)

試卷答案:

1. –
2. 24 cm
3. a) AD = 7 cm, CD = 32 cm
   b) 104 cm
4. 99
5. a) 120 m
   b) The claim is wrong.
6. a) 5 units
   b i) 10 units
   ii) –
7. a) AB = \(\sqrt{20}\) = 4.47 cm
   b) –
8. a) 84 cm²
   b) I do not agree.
9. a) –
   b)15 cm
10. 6.4 units
11. a) \(DP = \sqrt{x^{2}+9}\)
    b) 7/8 cm
    c) PQ = 3.75 cm
12. a) \(2\sqrt{2}\)
    b) \(\dfrac{6\sqrt{15}}{5}\)
13. –
14. 229
15. \(\dfrac{3\sqrt{14}}{2}\)
16. a) 48 cm
    b) The foot of the ladder will be moved 51 cm away from the wall.

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