Hart, C. A. (Clara Avis), b. 1863, Feldman, Daniel D., b. 1872 · New York, American Book Co · leaf 85
rsal making the transversal supplementary, the lines are parallel. (2) Two straight lines perpendicular to a third straight lineare parallel to each other. (3) Two straight lines parallel to a third straight line areparallel to each other. (4) After parallelograms have been studied, the fact… … Given Zl and the A at E^ with AB || EF and AC || BE, To prove Z1=Z2=Z3, and Zl + Z4 = 2 rt.Z% Zl + /5 = 2rt.Zs. Argument 1. Prolong BA and BE until they intersect at somepoint as H, 2. Z1 = Z6. 3. Z2 = Z6. 4. .-. Z1=Z2. o. Z3=Z2. 6. .-. Z1 = Z3. 7. Z2 + Z4 = 2rt.A S. .-. Z 1 4- Z 4 = 2 rt. A,…
Geometry, Plane · Geometry, Solid
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