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" Three times the sum of the squares on the sides of a triangle is equal to four times the sum of the squares of the lines joining the middle point of each side with the opposite angles. "
The Harpur Euclid: An Edition of Euclid's Elements - Page 143
by Edward Mann Langley, W. Seys Phillips - 1890 - 515 pages
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The geometry, by T. S. Davies. Conic sections, by Stephen Fenwick

Royal Military Academy, Woolwich - Mathematics - 1853 - 400 pages
...together with double the square on half the base. 8. Three times the sum of the squares on the three sides of a triangle is equal to four times the sum of the squares of the Hues drawn from the angles to bisect the opposite sides. 9. The difference between the squares...
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Euclid's Elements of plane geometry [book 1-6] explicitly enunciated, by J ...

Euclides - 1860 - 142 pages
...hypotenuse DE, and therefore (Ex. 2, Book II.) AC2 = AD • AE ; and hence AE is the line required. Three times the sum of the squares on the sides of...triangle, is equal to four times the sum of the squares on the three lines drawn from the angles to the middle of the opposite sides. Let ABC be a triangle, and...
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The Elements of Euclid for the Use of Schools and Colleges: Comprising the ...

Euclid, Isaac Todhunter - Euclid's Elements - 1867 - 424 pages
...difficulty in drawing for himself the requisite figures in the cases where they are not given. 1. The tum of the squares on the sides of a triangle •is equal to twice the square on half the base, together with twice the square on the straight line which joins...
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An Elementary Course of Plane Geometry

Richard Wormell - Geometry, Modern - 1868 - 286 pages
...the difference of the squares of A B. BC, is equal to the difference of the squares of AD, DC. 10. Three times the sum of the squares on the sides of...triangle is equal to four times the sum of the squares of the lines joining the middle point of each side with the opposite angles. 1 1 . The squares of the...
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An Elementary Course of Plane Geometry

Richard Wormell - Geometry, Plane - 1870 - 304 pages
...the difference of the squares of AB, BC, is equal to the difference of the squares of AD, D C. 10. Three times the sum of the squares on the sides of...triangle is equal to four times the sum of the squares of the lines joining the middle point of each side with the opposite angles. 1 1 . The squares of the...
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The Bombay university calendar, Volume 1

Bombay city, univ - 1873 - 616 pages
...tangle contained by the whole and one of the parts may be equal to the square on the other part. 5. The sum of the squares on the sides of a triangle is 11 ual to twice the square on half the bass together with twice tVie square on the straight line which...
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Elements of Euclid Adapted to Modern Methods in Geometry

Euclid, James Bryce, David Munn (F.R.S.E.) - Geometry - 1874 - 236 pages
...evanescence, and to which we can make the sum approach as near as we please. Cor. 4. — Since the difference of the squares on the sides of a triangle is equal to the difference of the squares on the segments of the base, made by a perpendicular from the vertex...
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The Elements of Euclid, containing the first six books, with a selection of ...

Euclides - 1874 - 342 pages
...the segments into which it is divided is equal to the square on the other side. 63. The difference of the squares on the sides of a triangle is equal to the difference of the squares on the segments of the base made by a perpendicular from the opposite...
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The elementary geometry of the right line and circle

William Alexander Willock - Circle - 1875 - 196 pages
...of the line joining their points of bisection. 14. Prove that three times the sum of the squares of the sides of a triangle is equal to four times the sum of the squares of the bisectors of the sides drawn from the vertices of the triangle. 15. Prove that the sum of the...
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Modern geometry [ed.] with an appendix by W.B. Jack

Richard Wormell - 1876 - 268 pages
...squares of AB, BC is equal to the difference of the squares of AD, D С. 112. Three times the sum oí the squares on the sides of a triangle is equal to four times the sum of the squares of the lines joining the middle point of each side with the opposite angle. 113. The squares on the...
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