 | Euclid, Isaac Todhunter - 1883 - 400 sider
...right angle ; [Hypothesis. which is absurd. Therefore the angles ABC and DEF are not unequal ; that is, they are equal. And the angle at A is equal to the angle at D; [Hypothesis. therefore the remaining angle at C is equal to the remaining angle at F ; EUCLID'S ELEMENTS.... | |
 | Euclid
...angle DEF; therefore it is equal to it. But the angle at A is also equal to the angle at D ; therefore the remaining angle at C is equal to the remaining angle at F. [i. 32] Therefore the triangle ABC is equiangularwith the triangle DEF. But, again, let each of the... | |
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D ; wherefore the remaining angle at C is equal to the remaining angle at F ; Therefore the triangle ABC is equiangular to the triangle DEF. Next, let each of the angles at C, F be not less than a right angle ; the triangle ABC is also, in this case,... 
