Kiem tra 45p- Hinh 8 - Tiet 54
Chia sẻ bởi Trương Thị Lương |
Ngày 13/10/2018 |
45
Chia sẻ tài liệu: Kiem tra 45p- Hinh 8 - Tiet 54 thuộc Hình học 8
Nội dung tài liệu:
Trường THCS Việt Tiến Kiểm tra : 45p
Họ và tên : .................................. Môn: Toán 8
Lớp: 8... Ngày kt ...................Ngày trả..................
Điểm
Lời phê của thầy cô giáo
Câu 1: Viết tỉ số của các cặp đoạn thẳng có độ dài như sau:
a) AB = 7cm và CD = 14cm
b) MN = 20cm và PQ = 10cm
Câu 2: Xem hình bên dưới: biết AB = 4cm, AC = 6cm và AD là phân giác của góc A
a)Tính .
b) Tính DB khi DC = 3cm.
Câu 3:Cho (ABC có AB = 4cm, AC = 6cm.Trên cạnh AB và AC lần lượt lấy điểm D và điểm E sao cho AD = 2cm, AE = 3cm. Chứng minh DE // BC.
Câu 4: Cho tam giác MNP vuông ở M và có đường cao MK.
a) Chứng minh (KNM (MNP (KMP.
b) Chứng minh MK2 = NK . KP
c) Biết NK = 4cm, KP = 9cm. Tính diện tích tam giác MNP.
Bài làm
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Họ và tên : .................................. Môn: Toán 8
Lớp: 8... Ngày kt ...................Ngày trả..................
Điểm
Lời phê của thầy cô giáo
Câu 1: Viết tỉ số của các cặp đoạn thẳng có độ dài như sau:
a) AB = 7cm và CD = 14cm
b) MN = 20cm và PQ = 10cm
Câu 2: Xem hình bên dưới: biết AB = 4cm, AC = 6cm và AD là phân giác của góc A
a)Tính .
b) Tính DB khi DC = 3cm.
Câu 3:Cho (ABC có AB = 4cm, AC = 6cm.Trên cạnh AB và AC lần lượt lấy điểm D và điểm E sao cho AD = 2cm, AE = 3cm. Chứng minh DE // BC.
Câu 4: Cho tam giác MNP vuông ở M và có đường cao MK.
a) Chứng minh (KNM (MNP (KMP.
b) Chứng minh MK2 = NK . KP
c) Biết NK = 4cm, KP = 9cm. Tính diện tích tam giác MNP.
Bài làm
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