4495 подібні трикутники 8 клас

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20004 =
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60
20004 =

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: =2 , AC= 9, =6, =4 ,AK=3. ABC.
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: KLM
AB= 12 KL= 6 BC= 16 LM= 8
AC= 24 KM= 12
:
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KLM AB BC ACKL LM KM12 16 246 8 12
2 2 2
B
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, = 900, -
1) CH2 = AH . BH;2) BC2 = BA . BH; 3) AC2 = AB . AH.

:
1) : = + 4) : 2 = . = 25 . 2 = 9 . 252) : 2 = . = 3 . 5 2 = 16 . 25 = 15 . = 4 . 5 = 20 .3) : 2 = . 2 = 16 . 9 = 4 . 3 = 12 .
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D
; , , ; BD ; DC = 16 , D = 25 . AC, CB, AB, BD.
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AB CBAD CD=

: ,-,=30,=20,=12:
20
30
12
` : C AP CP
=
30 1220 CP=
CP= 12*2030
24 3 = 8(c)
: = 8
=

BD , = 24 , = 20 , AD 3 CD.
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