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DE + DAP AN+MA TRAN HAY

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C B A x 20 ° Hi nh 2 E D D C B A Hinh 3 3 2 1 B A c b a TRƯỜNG THCS BẢO THUẬN KIỂM TRA CHẤT LƯỢNG HỌC KÌ I LỚP 7:…………………  MÔN : TOÁN lơ ́ p 7 Ho ̣ va ̀ tên:………………. Điểm Lời phê của giáo viên Bài 1:                 + −  ÷  ÷     Ba ̀ i 2             + ++ Bài 3:          !    " # $$"%  & Bài 4: '    ()*+)+,-  *&*&*. Bài 5:  +(/0!     x y = 1  +2() Bài 6:' # 03%4 # 5( 6 3! #  " # 14  0 # 03%4 # 5+-70+)  ().  ! #    6 3! # Bài 7: '      +8 Bài 8:9: ;   0 #     ().+- /<=  5  0 #  ; (  50  0 #  6 (>0+). Bài 9:'/0!  5"     # 510! # 55  (-? 6 0"  /0! 5 "! 6     510! # 55  (@=5 "   6   5"3  %  Bài 10'  /0!  AA/1   µ µ    A A+ = -  5  <   Bài 11:'5  +B(>  5  /: # B3  0$"50   6 5  +B(-"  (0! 6 C!0B+3"  ( 0! 6 <!0B(BC)B<-"  (0! 6 '!0B%  50'C)'< Bài 12: '  1: ; %  50 ∆ C<D) ∆ C'D MA TRÂ ̣ N E @ # 0F 5 @" # /0!   50! 6 9" # F # 5  6 5  % # 0! # $:  $  -         6 3! # %  -            -      G # 03%4 # 5 6 3! #  " # , 6 3! # 50 #         ?    1    0 # -        ?05    0 6 -      ?0%4  5= 6 55 5-      ?050  /=  5         6 5    5  5 50          6 5         ĐÁP ÁN Bài 1:                 + −  ÷  ÷     )              + −  ÷  ÷     )    )     Ba ̀ i 2           + ++ )               + ++  ÷  ÷      )22    )    Bài 3: ≈ & ≈  Bài 4: '    ()*+)+,- *)-,). *)-,) *.)-.,). Bài 5:  +(/0!     x y = 1  +2()      x y = )      x y+ = = +  )H+)-)&+)-)  Ba ̀ i 69  +1  (3  0 # 03%4 # 5 6 3! #  " # !()>+ (+)().1  ()>+  .)>-)H>). Bài7: I:   ∆ C<D   · µ  ABD A+ = )H µ ·        A ABD= − = − =  I:   ∆ C'J   · µ  ACE A+ = )H ·  x ACE= =  Bài 8 9: ; %4 #   0 # %4 #   /70+).  ()  Bài 9: K # 0+3    5""  ! 6     510! # 55  (  9  =5 "   6   5"3  % !  5"1  4  050?'93  0 # 03%4 # 5 6 3! #  50 #   :!       x = )H+)   9" # (! 6 ?'955  ("  5" Bài 10:    µ µ    A A+ =    µ  A ) µ  A   0 6  )H µ  A ) µ  A )   9  AA/! µ ¶    A B= = 3:5   Bài 11: 9: ;   50K,7   Chư ́ ng minh: I:   ∆ BC'1   ∆ B<'   BC)B<5 · · AOC BOC= B3  0$"50   B'3   #  5-  ⇒  ∆ BC') ∆ B<',5, ⇒ 'C)'<?0 # %45%  5  Bài 12: I:   ∆ C<D1  ∆ C'D   µ µ  B C= =   CD3   #  5  · · BAD CAD= 5  )H ∆ C<D) ∆ C'D #  (!  ,5   #   K · xOy >  5  /: #  B3  0$"50   6  · xOy BC)B<C ∈ B+&< ∈ B(&' ∈ B 7 'C)'< C B A t y x O .   Ba ̀ i 2           + + − + )               + + − +  ÷  ÷     . Bài 5:   + (/0!     x y = 1  + 2()      x y = )      x y+ = = +  )H + )-)& + )-)

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