Plane geometry, with problems and applications (1910)
Slaught, H. E. (Herbert Ellsworth), 1861-1937, Lennes, N. J. (Nels Johann), 1874- joint author · Boston, Allyn and Bacon · leaf 176
A C D A CD Given A ABC and ASC, with altitudes BD and BIf.To prove that area A ABC AB^ B(? C^ Bl? areaA^sc ab ca 72 BD Proof:But Hence area A ABC _ ^(AC x .bd) _ AC BD areaA^^o |(^cx bz») ac bb AC area A ABC BD BD Ic area AAbc Ac BD Why?Why? Give the proof for each of the other pairs of… … 164 PLANE GEOMETRY. 323. Theorem. The areas of two similar polygonsare in the same ratio as the squares of any two corre-sponding sides or any two corresponding diagonals. -Ac
Geometry, Plane
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