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)
Giáo án công ngh 8ệ
I. M c tiêu:ụ
1. Ki n th c:ế ứ Đ c đ c b n v kĩ thu t c a các v t th có hình d ng kh i tròn xoay.ọ ượ ả ẽ ậ ủ ậ ể ạ ố
2. Kĩ năng: V đ c hình chi u c a v t th có kh i tròn xoay.ẽ ượ ế ủ ậ ể ố
3. Thái đ :ộ Yêu thích môn h c, h ng thú trong gi i h c, làm vi c nghiêm túc.ọ ứ ờ ọ ệ
II. Chu n b :ẩ ị
1. GV: Tranh v , mô hình v t th hình 7.1, 7.2.ẽ ậ ể
2. HS: Đ c tr c bài nhà, báo cáo th c hành.ọ ướ ở ự
III. T ch c ho t đ ng d y và h c:ổ ứ ạ ộ ạ ọ
1. n đ nh l p:Ổ ị ớ (1 phút)
8A1:………………………………………………..
8A2:………………………………………………..
2. Ki m tra bài cũ:ể (10 phút)
- Có các kh i tròn xoay c b n nào? L y ví d .ố ơ ả ấ ụ
- Đ c đi m hình chi u c a các kh i tròn xoay? ặ ể ế ủ ố
- V hình chi u đ ng c a hình nón và hình tr ?ẽ ế ứ ủ ụ
3. Đ t v n đặ ấ ề : Gi i thi u n i dung bài th c hành. ớ ệ ộ ự
4. Ti n trình:ế
HO T Đ NG C A HSẠ Ộ Ủ TR GIÚP C A GVỢ Ủ
Ho t đ ng1: Tìm hi u n i dung th c hành: (7 phút)ạ ộ ể ộ ự
- Theo dõi.
- Đ c bài theo h ng d n c a GV. Tìm h ngọ ướ ẫ ủ ướ
gi i quy t bài th c hành.ả ế ự
- Gi i thi u m c đích bài th c hành.ớ ệ ụ ự
- Cho HS đ c ph n ti n trình bài th c hành.ọ ầ ế ự
Ho t đ ng 2: T ch c th c hành: (20 phút)ạ ộ ổ ứ ự
- Ti n hành theo h ng d n c a GV.ế ướ ẫ ủ
B ng 7.1ả
- HS: Quan sát hình v và mô hình.ẽ
- HS: Phân tích hình d ng c a t ng v t th đạ ủ ừ ậ ể ể
nh n bi t.ậ ế
- HS: T hoàn thành b ng 7.2 ự ả
B ng 7.2ả
- H ng d n HS quan sát và hoàn thành b ngướ ẫ ả
7.1 và b ng 7.2?ả
Bài 7: Th c Hành ự
Đ C B N V CÁC Ọ Ả Ẽ
KH I TRÒN XOAYỐ
Vât thể
B n vả ẽ A B C D
1 x
2 x
3 x
4 x
V t thậ ể
Kh iố
hình h c ọA B C D
Hình trụx x
Hình nón c tụx x
Hình h pộx x x x
Hình ch m c uỏ ầ x