class 8 math lesson 11 (geometry)
TRANSCRIPT
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11
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c
db
a
DA
EB
F
x
C
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...
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, :() () () () ()
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a
bc
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C
e
A
EB D
b
ec
a
: , a, b, c d, e ,
d d
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:(1) BE BD=e B D a
b BD A
() , D A c d BD A C () AB, A D, B C CD , ABCD -
C
A
EB D
b
ec
ad
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-5:
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() 3 . ., 4 . ., 4.5 . . 5.2 . .6 . .
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. ?2. ?. ?
110
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