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I Am A Champion Essay

608 words - 3 pages

i am a champion


- Đánh giá được kỹ năng của học sinh nhận biết được các loại đa diện và đa diện đều .
- Đánh giá được khả năng phân chia và lắp ghép các khối đa diện ,để giải các bài toán về thể tích
+ Biết tính được diện tích các hình tam giác ,hình vuông ,hình chữ nhật ,hình thang …

+ Biết tính được thể tích các khối chóp , khối hộp , khối lăng trụ …..

+ Biết vận dụng được công thức tỷ số thể tích , để tính thể tích một khối đa diện được đơn giản hơn


- Giáo viên : Đề - Đáp án – Thang điểm
- Học sinh : Ôn tập các kiến thức trọng tâm của chương I

| ...view middle of the document...


Câu 1: (7,0 điểm)

Cho hình hộp chữ nhật ABCD. A’B’C’D’ có AB = 3m, BC = 4m, AA’ =3m. Lấy điểm M trên cạnh AA’ sao cho A’M = 2MA

a) Mặt phẳng (AB’D’) chia khối hộp thành hai khối đa diện nào?

b) Tính thể tích khối hộp ABCD. A’B’C’D’

c) Tính thể tích khối chóp M.A’B’D’

Câu 2: (3,0 điểm)

Cho khối chóp S.ABCD với đáy ABCD là hình vuông cạnh a. Cho biết SA ( ( ABCD) và góc giữa SB với mặt đáy (ABCD) một góc 600. Tính thể tích khối chóp S.ABCD.


|Câu |Nội dung |Điểm |
|Câu 1 |Hình vẽ 1 điểm | |
|(7,0 điểm) | | |
| | | |
| | |1 điểm |
| | | |
| | | |
| |a. Mặt phẳng (AB’D’) chia khối hộp thành hai khối đa diện tứ diện AA’B’D’ và khối đa diện ABCDD’B’C |2 điểm |
| |b. Thể tích khối hộp ABCD. A’B’C’D’ là | |
| |V=AB.BC.AA’=3.4.3=36(m3) |2 điểm |
| |c. Khối chóp M.A’B’D’ có chiều cao MA’=2m | |
| |Đáy là tam giác vuông A’B’D’ vuông tại A’. |2 điểm |
| |V=1/3. SA’B’D’.MA’=1/3.1/ | |
|Câu 2 |[pic] ...

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