Kiểm tra : 45p Môn: Toán 8 Trường THCS Việt Tiến

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
Cõu 1: Viết tỉ số của cỏc cặp đoạn thẳng cú độ dài như sau:
a) AB = 7cm và CD = 14cm
b) MN = 20cm và PQ = 10cm
Cõu 2: Xem hỡnh bờn dưới: biết AB = 4cm, AC = 6cm và AD là phõn giỏc của gúc A

a)Tớnh .
b) Tớnh DB khi DC = 3cm.

Cõu 3:Cho VABC cú AB = 4cm, AC = 6cm.Trờn cạnh AB và AC lần lượt lấy điểm D và điểm E sao cho AD = 2cm, AE = 3cm. Chứng minh DE // BC.
Cõu 4: Cho tam giỏc MNP vuụng ở M và cú đường cao MK.
a) Chứng minh VKNM VMNP VKMP.
b) Chứng minh MK2 = NK . KP
c) Biết NK = 4cm, KP = 9cm. Tớnh diện tớch tam giỏc MNP.
Bài làm
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