Elements of geometry, containing books I and II with exercises and notes (1882)
Smith, J. Hamblin (James Hamblin), 1829-1901 · Toronto : Gage · leaf 37
Produce BC to D. Then i ACD is greater than z ABC. I. 16. .•. z s ACD, ACB are tofjether greater than z sABC, ACB. But AS ACD, ACB together = two rt. z s. I. 13 .*. z sABC, ACB are together less than two rt. z s.Similarly it may be shewn that is ABC, BAO and nlscithat z sBAC, ACB are together less… … the angles MOP ana NPO are together less than two rightangles. The Sixth Postulate asserts that if a line DE meeting twoother lines BiU, CN makps MOP, XPO, the two interior Book I.] FROPOSITIOX XVUL 31 angles on the same side of it, together less than two right angles, BM. and CN shall meet if…
Geometry
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