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(i) If in a A ABC, a line DE || BC, intersects AB in D and AC in E, then:AB /AD = AC/AEPROOF :From the basic proportionality theorem, we haveAD/ DB =AE/EC1+DB/ EC= 1 +AD /AEAD + DB /AD= AE + EC/AEAB/AD =AC/AEmy question is why we are adding 1 to both side in step second |
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Answer» ong>Answer: Adding both SIDE wont CHANGE the value but this makes our way towards our destination i.e. our proofe .. on adding 1 we next do ADDITION by LCM method nd hence we get our ques prooved... hope it helps u ... IF STILL NOT UNDERSTOOD COMMENT DOWN I'LL CLARIFY IT.. THANKX |
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