Đề KT HH8(ch3) 100% Tự luận
Chia sẻ bởi Quang Ly |
Ngày 18/10/2018 |
35
Chia sẻ tài liệu: Đề KT HH8(ch3) 100% Tự luận thuộc Hình học 9
Nội dung tài liệu:
Trường THCS Tiến Hưng ĐỀ KIỂM TRA 1 TIẾT CHƯƠNG 3
Họ tên :............................................. MÔN: HÌNH HỌC 9
Lớp 9A ...
Điểm
Lời phê
I/ LÝ THUYẾT: (2 điểm) Phát biểu định nghĩa và tính chất của góc nội tiếp.
Áp dụng: Tính số đo góc AMB, biết số đo cung nhỏ AB là 600.
M
B
II/ BÀI TẬP : (8 điểm)
Bài 1 : (3 điểm) Cho tam giác đều DEF nội tiếp đường tròn (O;5cm) A
a./ Tính diện tích hình tròn.
b./ Tính diện tích hình quạt tròn EOF.
Bài 2 : (5 điểm) Cho (ABC nhọn, nội tiếp đường tròn (O; 3cm). Vẽ 2 đường cao BE và CF cắt nhau tại H.
a) Chứng minh tứ giác AEHF nội tiếp.
b) Chứng minh tứ giác BFEC nội tiếp.
c) Tính độ dài cung nhỏ AC.
d) Chứng minh : FE.CH = EH.BC
Bài làm
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Họ tên :............................................. MÔN: HÌNH HỌC 9
Lớp 9A ...
Điểm
Lời phê
I/ LÝ THUYẾT: (2 điểm) Phát biểu định nghĩa và tính chất của góc nội tiếp.
Áp dụng: Tính số đo góc AMB, biết số đo cung nhỏ AB là 600.
M
B
II/ BÀI TẬP : (8 điểm)
Bài 1 : (3 điểm) Cho tam giác đều DEF nội tiếp đường tròn (O;5cm) A
a./ Tính diện tích hình tròn.
b./ Tính diện tích hình quạt tròn EOF.
Bài 2 : (5 điểm) Cho (ABC nhọn, nội tiếp đường tròn (O; 3cm). Vẽ 2 đường cao BE và CF cắt nhau tại H.
a) Chứng minh tứ giác AEHF nội tiếp.
b) Chứng minh tứ giác BFEC nội tiếp.
c) Tính độ dài cung nhỏ AC.
d) Chứng minh : FE.CH = EH.BC
Bài làm
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