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" In any triangle, the square of the side opposite an acute angle is equal to the sum of the squares of the other two sides diminished by twice the product of one of those sides and the projection of the other upon that side. "
Plane and Solid Geometry - Σελίδα 150
των Arthur Schultze, Frank Louis Sevenoak - 1901 - 370 σελίδες
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Plane and Solid Geometry: To which is Added Plane and Spherical Trigonometry ...

George Roberts Perkins - 1860 - 443 σελίδες
...THEORRM XVI. In any triangle, the square of the side opposite an acute angle is equal to the sum of the squares of the other two sides, diminished by twice the product of one of these sides, by the projection of the other on the preceding one, produced if necessary. If the angle...

A Treatise on Elementary Geometry: With Appendices Containing a Collection ...

William Chauvenet - 1871 - 368 σελίδες
...THEOREM. 52. In any triangle, the square of the side opposite to an acute angle is equal to the sum of the squares of the other two sides diminished by twice the product of one of these sides and the projection of the other upon that side. Let C be an acute angle of the triangle...

A Treatise on Elementary Geometry: With Appendices Containing a Collection ...

William Chauvenet - 1872 - 368 σελίδες
...XV.—THEOREM. 52. 7)i any triangle, the square of the side opposite to an acute angle is equal to the sum of the squares of the other two sides diminished by twice the product of one of these sides and the projection of the other •upon thnt side. Let C be an acute angle of the triangle...

Catalogue - Harvard University

Harvard University - 1874
...proportionally. 6. In any triangle the square of the side opposite to an acute angle is equal to the Bum of the squares of the other two sides diminished by twice the product of one of these sides and the projection of the other upon that side. 7. The area of a trapezoid is equal to...

Annual Register of the United States Naval Academy, Annapolis, Md, Τόμοι 25-32

United States Naval Academy - 1874
...length. 3. Prove that in any triangle the square of a side opposite an aeute angle is equal > th« sum of the squares of the other two sides diminished by twice the product of R- of these sides and the projection of the other upon that side. Show how to draw tangent to a given...

Elements of Plane and Solid Geometry

George Albert Wentworth - 1877 - 398 σελίδες
...THEOREM. 335. In any triangle, the square on the side opposite an acute angle is equivalent to the sum of the squares of the other two sides diminished by twice...one of those sides and the projection of the other upon that side. A Lot C be an acute angle of the triangle ABC, and DC the projection of AC upon B C....

Elements of Plane and Solid Geometry

George Albert Wentworth - 1877 - 398 σελίδες
...335 (in any Л the square on the side opposite an acute Z is equivalent to the sum of the squares on the other two sides, diminished by twice the product...one of those sides and the projection of the other upon that side). Add these two equalities, and observe that BM = M С. Then A~ff + AC2 = 2 BM2 + 2...

Elements of Plane and Solid Geometry

George Albert Wentworth - 1877 - 398 σελίδες
...opposite the obtuse angle is equivalent to the sum of the squares of the other two sides increased by twice the product of one of those sides and the projection of the other on that side. A с ^в Let С be the obtuse angle of the triangle ABC, and CD be the projection of...

Elements of Plane and Solid Geometry

George Albert Wentworth - 1877 - 398 σελίδες
...the square on the side opposite an ande angle is equivalent to the sum of the squares of the oiler two sides diminished by twice the product of one of those sides and t he projection of the other upon that side. D Fig. 1. Fig. 2. Let С be an acute angle of the triangle...

Elements of Geometry

George Albert Wentworth - 1881
...335. In any triangle, the square un the side opposite an acute angle is equivalent to tfie sum of (he squares of the other two sides diminished by twice...one of those sides and the projection of the other upon that side. F1g. 2. Let С be an acute angle of the triangle ABC, and DC the projection oí AC...




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