Hart, C. A. (Clara Avis), b. 1863, Feldman, Daniel D., b. 1872 · New York, American Book Co · leaf 90
ed diagram.) Ex. 237. If at the ends of the hypotenuse of a right triangle per-pendiculars to the hypotenuse are drawn meeting the other two sides ofthe triangle prolonged, then the figure contains five triangles which aremutually equiangular. Ex. 238. If one angle of a triangle is 60° and another… … 80 PLAXE GEOMETRY Proposition XXYIII. Theorem 215. An exterior angle of a triangle is equal to the sumoftlve two remote interior angles, B
Geometry, Plane · Geometry, Solid
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