The Common Sense of the Exact Sciences

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D. Appleton, 1885 - Mathematics - 271 pages
 

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Page i - ... of Monocular and Binocular Vision. By JOSEPH LE CONTE, LL. D. With 132 • Illustrations. $1.50.
Page 72 - The areas of two triangles which have an angle of the one equal to an angle of the other are to each other as the products of the sides including the equal angles. D c A' D' Hyp. In triangles ABC and A'B'C', ZA = ZA'. To prove AABC = ABxAC. A A'B'C' A'B'xA'C' Proof. Draw the altitudes BD and B'D'.
Page 75 - An exterior angle of a triangle is equal to the sum of the two interior opposite angles; and the sum of the three interior angles of a triangle is equal to two right angles.
Page 74 - ... the three angles of a triangle are together equal to two right angles, although it is not known to all.
Page ii - XXXVII. THE FORMATION OF VEGETABLE MOULD, THROUGH THE ACTION OF WORMS. With Observations on their Habits. By CHARLES DARWIN, LL. D., FRS, author of " On the Origin of Species,

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