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I Am a Champion

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Submitted By nguyenthimyle
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i am a champion
KIỂM TRA 1 TIẾT CHƯƠNG I

I-MỤC TIÊU :

- 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

II- CHUẨN BỊ :

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

| |Nhận biết |Thông hiểu |Vận dụng |Tổng điểm |
|j Mức độ | | | | |
|Nội dung | | | | |
|Khái niệm về khối đa diện | |Câu 1 | | |1 |
| | |6 điểm | | |6 điểm |
|Tính thể tích khối đa diện | | |Câu 2 | |1 |
| | | | | |2 điểm |
| | | |2 điểm | | |
|Hình vẽ | 2 điểm | | | | 2 điểm |
| Tổng | | | | |3 |
| |2,0 điểm |6,0 điểm |2,0 điểm | |10,0 điểm |

IV. ĐỀ KIỂM TRA 1 TIẾT CHƯƠNG I

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.

V. ĐÁP ÁN

|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’=1/3.1/2.3.4.2=4(m3) | |
|Câu 2 |[pic] | |
|(3,0 điểm) |Hình vẽ | |
| |Ta có [pic] | |
| |Vì AB là hình chiếu của SB lên ( ABCD) nên góc giữa SB với (ABCD) là góc [pic] | |
| |* SABCD = a2 | |
| |* Trong (SAB ta có tan600 = [pic] | |
| |Vậy VS.ABCD = [pic] | |
| | |1,0 |
| | | |
| | | |
| | |0.5 |
| | | |
| | |0.5 |
| | | |
| | |0.5 |
| | |0.5 |

-----------------------

B’

A’

D’

C’

B'

A

D

C

M

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