Exercises on Euclid and in modern geometry for the use of schools, private students, and junior university students (1881)
McDowell, James L · Cambridge, Deighton, Bell, and Co. · leaf 142
line which is called thelinear unit. 151. If a perpendicular be drawn from the right angleof a triangle to the hypotenuse, the square on its reciprocalis equal to the sum of tlte squares on the reciprocals of thesides. Let ABC be a triangle having the angle ACB right. DrawCD perpendicular to the…
Geometry
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