Câu hỏi trắc nghiệm (10 câu):
-
- A. 15
- B. 30
- C. 11
- D. 10
-
- A. \(V=2{{a}^{3}}\).
- B. \(V=4{{a}^{3}}\).
- C. \(V=6{{a}^{3}}\)
- D. \(V=12{{a}^{3}}\).
-
- A. \(V = Sh\)
- B. \(V = \frac{1}{2}Sh\)
- C. \(V = \frac{1}{3}Sh\)
- D. \(V = \frac{1}{6}Sh\)
-
- A. \(\frac{1}{2}\)Bh
- B. 3Bh
- C. Bh
- D. \(\frac{1}{3}\)Bh
-
- A. \(\frac{{4\sqrt 2 {a^3}}}{3}\)
- B. \(\frac{{8{a^3}}}{3}\)
- C. \(\frac{{8\sqrt 2 {a^3}}}{3}\)
- D. \(\frac{{2\sqrt 2 {a^3}}}{3}\)
-
- A. \(V=\frac{{{a}^{3}}\sqrt{2}}{6}.\)
- B. \(V=\frac{{{a}^{3}}\sqrt{2}}{4}.\)
- C. \(V={{a}^{3}}\sqrt{2}.\)
- D. \(V=\frac{{{a}^{3}}\sqrt{2}}{3}.\)
-
- A. \(\frac{{{V_{S.A'B'C'}}}}{{{V_{S.ABC}}}} = \frac{{SA'}}{{SA}} + \frac{{SB'}}{{SB}} + \frac{{SC'}}{{SC}}\)
- B. \(\frac{{{V_{S.A'B'C'}}}}{{{V_{S.ABC}}}} = \frac{{SA'}}{{SA}} - \frac{{SB'}}{{SB}} - \frac{{SC'}}{{SC}}\)
- C. \(\frac{{{V_{S.A'B'C'}}}}{{{V_{S.ABC}}}} = \frac{{SA'}}{{SA}}=\frac{{SB'}}{{SB}}=\frac{{SC'}}{{SC}}\)
- D. \(\frac{{{V_{S.A'B'C'}}}}{{{V_{S.ABC}}}} = \frac{{SA'}}{{SA}} . \frac{{SB'}}{{SB}} . \frac{{SC'}}{{SC}}\)
-
- A. a3
- B. 2a3
- C. 6a3
- D. 8a3
-
- A. 2a
- B. 3a
- C. a3
- D. a
-
- A. 24
- B. 12
- C. 10
- D. 8
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