 | William Betz, Harrison Emmett Webb, Percey Franklyn Smith - Geometry, Plane - 1912 - 356 pages
...THEOREM 420. 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...one of those sides and the projection of the other upon it. FIG. 1 FIG. 2 Given, in the triangle ABC, that p is the projection of the side b upon the... | |
 | Military Academy, West Point - 906 pages
...side opposite the obtt« angle Is equal to the sum of the squares of the other two sides, incrt.ie1' by twice the product of one of those sides and the projection of the otto' side upon it. 10 Theorem : Л line parallel to the bases of a trapezoid, passing through ti!... | |
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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. 
