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AE is not parallel to BC.
Similarly we can prove than neither is any other straight line except AD; therefore
AD is parallel to BC.
Being what it was requaire to prove.
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T H E E L E M E N T S |
Book I Proposition 39 | |
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Therefore AE is not parallel to BC. Similarly we can prove than neither is any other straight line except AD; therefore AD is parallel to BC. Being what it was requaire to prove. |
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