PHÒNG GD&ĐT BÌNH GIANG ĐỀ KIỂM TRA HỌC KỲ II NĂM HỌC 2012 – 2013 MÔN TOÁN - LỚP 7

   !"# Thời gian làm bài: 90 phút  $%(2,0 đim).             = + − − + −  !"#$%&%'()*  +, /012*&3 4  − "  3 $% (3,0 đim).   5   6  = − + "      = − − 4 5   +  4 5   − 78*  5  = − $% (1,0 đim).  9  . .= − "   :  . . . = + − 7#;9<: $%& (3 đim). 9:∆ " =(93>?%@':AA ∈ 93>?AB ⊥ :B ∈ :CD,E*:9"BA3F  9:A B:A ∆ = ∆  AD A = G#':"HDB $%' (1 đim).     9  I . . = − + +    : J . I. = − − − KFLM=NO'P1QR(S'P *C.3 TTTTTTTTTTTTTTTTTTTT()TTTTTTTTTTTTTTTTTTTT B!L!#UUUUUUUUUUUUUGV'1UUUUUUU333 WM4'PUUUUUUUUWM4'PUUUUUUUUUU  *"+,-./ 01 01   !"# BQH1XY 23 4567896 3:; $% <=3:;>    = − C    3   I − = − − = − C   3   = − = C $% <=3:;>      5    6      6     + = − + + − − = − + + − − C      = − + C       5   6      6     − = − + − − − = − + − + + C   6 =− + C <7Z;6< C Z<Z6 C < C $% <=3:;>  9 : + = L  : 9= −  ( ) ( )      . . .  . . = + − − − C       . . .  . . . . = + − − + = − C $%& <=3:;> [\7]CE M E H C B A ^_ 9:A ∆ " B:A ∆ O · = BAE · = 0 BHE 90 C :A,(   · = ABE · HBE :A,%@' C 9:A B:A ∆ = ∆ ( .CO ! C ^_ 9DA ∆ " BA ∆ O 9A<BA(QR* 'F  · = 0 BAE 9 0 L · = 0 MAE 90 M` · = 0 BHE 90 L · = 0 EHC 90 M` G . · = MAE · = 0 EHC 90 · =AEM · HEC Va C 9DA ∆ < BA ∆ CC C G .AD<A C O:9<:B"7 9:A B:A ∆ = ∆  9D<B"7 9DA ∆ < BA ∆  C G .:D<: C ^_ :DB ∆ O · = 0 BHM 90 # .:DbDB C /"G .:bDB C $%' <=3:;> cY.9d"H:CQe ( ) ( )      9 :  I . . J . I. + = − + + + − − − <     I 6. − − − C D     C I C 6. − ≤ − ≤ − ≤ 3G . 9 :  + ≤ 3 C [f.LM=NO'P1QR(S'P *C.3 C  ?@ABHc sinh lm cch khc đng vn cho đim ti đa.  .  +  4 5   −  7 8*  5  = − $% (1,0 đim).  9  . .= − "   :  . . . = + − 7 #;9<: $%&. − KFLM=NO'P1QR(S'P *C.3 TTTTTTTTTTTTTTTTTTTT()TTTTTTTTTTTTTTTTTTTT B!L!#UUUUUUUUUUUUUGV'1UUUUUUU333 WM4'PUUUUUUUUWM4'PUUUUUUUUUU  *"+, - ./ 01 01   !"# BQH1XY 23 45 67 896 3:; $% <=3:;>  . 90 · =AEM · HEC Va C 9DA ∆ < BA ∆ CC C G .AD<A C O:9<:B" ;7 9:A B:A ∆ = ∆  9D<B" ;7 9DA ∆ < BA ∆  C G .:D<: C ^_ :DB ∆ O · = 0 BHM