class 8 math lesson 13 (geometry)

13
1 সসসসসসস 1 সসসস সসসসসসস সসসসসস সসসসসস

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11

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, :() () () () ()

ab-5:

EBCa

xxyybAFGD : , a b

z

zH

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BE BC=a B C () BF BA=b A (3) AH CG D , ABCD-

EBCa

xybAFGD

zH

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