 ... be produced in the same direction ; then the sum of the exterior angles A, B, C, D, E, will be equal to four right angles. For each interior angle, together with its adjacent exterior angle, is equal to two right angles (Prop.  Manual of Mineralogy, Including Observations on Mines, Rocks, Reduction of ... - Seite 49von James Dwight Dana - 1869 - 454 SeitenVollansicht - Über dieses Buch
 | Robert Gibson - 1806 - 486 Seiten
...index, will give you the quantity of each respective angle. LEMMA. All, the angles of any polygon, are equal to twice as many right angles as there are sides less by four. Thus aU the angles A, B, C, D, E, F, G, are equal to twice as many right angles as there are... | |
 | Robert Gibson - 1808 - 482 Seiten
...index, will give you the quantity of each respective angle. LEMM A. All the angles of any polygon, arc equal to twice as many right angles as there are sides less by four. Thus, 'all the angles At B, C, D, .£, F, G, arc equal to twice as many right angles as there... | |
 | Robert Gibson - 1811 - 580 Seiten
...index, will give you the quantity of each respective angle. LEMMA. Att the angles of any polygon, are equal to twice as many right angles as there are sides less by four. Thus, all the angles A, B, C, D, £, f, G, are equal to twice as many right angles as there... | |
 | Robert Gibson - 1814 - 558 Seiten
...will give you the quantity of each respective angle. JLEMMA. • ЛИ the angles of any polygon, are equal to twice as many right angles as there are sides less by four. Thus, all the angles Л, B, C, D, E, F, G, are equal to twice as many right anglet as there... | |
 | J.D. Dana - 1855 - 440 Seiten
...and it should be repeated. 110° added to 60° makes 170°, showing in this case an error of 10°. 3. In any polygon, the sum of the angles is equal...twice 4, (or 8,) right angles, which is equivalent to 8 X 90° =720°. If we have a prism of six sides, and wish to ascertain the angles between these sides,... | |
 | Benjamin Greenleaf - 1862 - 518 Seiten
...equal to two right angles (Prop. I.) ; hence the sum of all the angles, both interior and exterior, is equal to twice as many right angles as there are sides to the polygon. But the sum of the interior angles alone, less four right angles, is equal to the same... | |
 | Benjamin Greenleaf - 1862 - 532 Seiten
...equal to two right angles (Prop. I.) ; hence the sum of all the angles, both interior and exterior, is equal to twice as many right angles as there are sides to the polygon. But the sum of the interior angles alone, less four right angles, is equal to the same... | |
 | Benjamin Greenleaf - 1863 - 504 Seiten
...equal to two right angles (Prop. I.) ; hence the sum of all the angles, both interior and exterior, is equal to twice as many right angles as there are sides to the polygon. But the sum of the interior angles alone, less four right angles, is equal to the same... | |
 | Benjamin Greenleaf - 1868 - 340 Seiten
...equal to two right angles (Prop. I.) ; hence the sum of all the angles, both interior and exterior, is equal to twice as many right angles as there are sides to the polygon. But the sum of the interior angles alone, less four right angles, is equal to the same... | |
 | Henry William Watson - 1871 - 320 Seiten
...triangles ABC, ACD, and so on. But the sum of all the angles of the polygon, together with four right angles, is equal to twice as many right angles as there are sides of the polygon. Also, the sum of all the angles at the bases of the triangles, together with the sum... | |
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