class 8 math lesson 6 (geometry ct)
TRANSCRIPT
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11
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06
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A
CD
B
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...
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( + -8.)
A
O
CD
BABCD BADOA , ABCOB ,
() ,
() ABCD , ABCD
() ,
OBAOAB
OBOA
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A
CD
B G
HE
F
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() EFGH ? () ,
() ,
(i) EF =GH , EH =FG (i)
DCBA
ADCABCBCDBAD ,
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?() () , () ()
?() () () ()
i. ii. iii.
() i ii () i iii () ii iii () i, ii iii
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Q
P D
C B
A
PAQC PA=CQ PA CQ. ABCD
ABCD ?A B
() () () ()
?() () () () ?() () () () ?() () () () ?() () () () 180 270 360 540
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?() () () () ?
() 4 () 2
2
1
()
()