Hart, C. A. (Clara Avis), b. 1863, Feldman, Daniel D., b. 1872 · New York, American Book Co · leaf 41
Fig. 1. Fig. 2. Ex. 67. Extend Ex. QQ> to the case in which the equal segmentsare laid off on the arms prolonged through the vertex (Fig. 2). 30 PLANE GEOMETRY pROPOsiTiox IV. Theoremm. The base angles of an isosceles triangle are equal. … Given isosceles A ABC, with AB and BC its equal sides.To prove /. A = Z. C, Argument Reasons 1. Let BD bisect Z ABC. 1. Every Z has but one bi-sector. § 53. 0 In A ABD and DBC,AB = BC, 2. By hyp. 3. BD = BD. 3. By iden. 4. Z1 = Z2. 4. By cons. 5. .-. aabd = Adbc. 5. Two A are equal if twosides and…
Geometry, Plane · Geometry, Solid
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