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Bøker Bok 151151 av 151ANY two angles of a triangle are together less than two right angles.
" ANY two angles of a triangle are together less than two right angles. "
The Elements of Euclid - Side 20
av Euclid - 1838 - 416 sider
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Elementary Geometry

...angle so formed is equal to the sum of the two interior opposite angles. (Proof as above.) COB. 3. Any two angles of a triangle are together less than two right angles. COB. 4. Every triangle has at least two of its angles acute. COB. 5. If two triangles have two angles...
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