KIEM TRA 45' CHUONG II

TRƯỜNG THCS VÕ THỊ SÁU KIỂM TRA CHƯƠNG II
TỔ: TOÁN – TIN – LÝ – CN MÔN: HÌNH HỌC 7
Thời gian: 45 phút (không kể thời gian giao đề)

Họ và tên:……………………………........

Lớp: 7……


Điểm

Lời phê của thầy giáo



Bài 1: (4 điểm) Cho (ABC , kẻ AH
BC.
Biết AB = 10cm ; BH = 6cm ; BC = 15cm (hình vẽ).
Biết
. Tính
?
Tính độ dài các cạnh AH, HC, AC.

Bài 2: (6 điểm)
Cho tam giác ABC cân tại A. Kẻ AI vuông góc
vớ BC tại I(I
BC). Lấy điểm E thuộc AB
và điểm F thuộc AC sao cho AE = AF,Gọi P là giao điểm của AI và EF. Chứng minh rằng:
a) BI = CI.
b)
IEF là tam giác cân.
c) EF song song với BC
Bài làm
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