Elements of Geometry: With Practical Applications, for the Use of Schools

Εξώφυλλο
Richardson and Lord, 1829 - 129 σελίδες
 

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Σελίδα 2 - Co. of the said district, have deposited in this office the title of a book, the right whereof they claim as proprietors, in the words following, to wit : " Tadeuskund, the Last King of the Lenape. An Historical Tale." In conformity to the Act of the Congress of the United States...
Σελίδα 48 - 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'.
Σελίδα 63 - The square described on the hypotenuse of a right triangle is equivalent to the sum of the squares on the other two sides.
Σελίδα 2 - ... and also to an Act, entitled, " An Act- supplementary to an Act, entitled, ' An Act for the encouragement of learning, by securing the copies of maps, charts, and books, to the authors and proprietors of such copies, during the limes therein mentioned ;' and extending the benefits thereof to the arts of designing, engraving, and etching historical, and other prints.
Σελίδα 14 - If a straight line meets two straight lines, so as to " make the two interior angles on the same side of it taken " together less than two right angles...
Σελίδα 15 - LET it be granted that a straight line may be drawn from any one point to any other point.
Σελίδα 41 - In any proportion, the product of the means is equal to the product of the extremes.
Σελίδα 14 - Things which are double of the same, are equal to one another. 7. Things which are halves of the same, are equal to one another.
Σελίδα 42 - Multiplying or dividing both the numerator and denominator of a fraction by the same number does not change the value of the fraction.
Σελίδα 14 - Things which are halves of the same are equal to one another. 8. Magnitudes which coincide with one another, that is, which exactly fill the same space, are equal to one another. 9. The whole is greater than its part. 10. Two straight lines cannot enclose a space. 11. All right angles are equal to one another.

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