Hart, C. A. (Clara Avis), b. 1863, Feldman, Daniel D., b. 1872 · New York, American Book Co · leaf 163
t that shall contain anangle of 105^ ; of 135°. Ex. 501. Find the locus of the vertices of all triangles having a com-mon base 2 inches long and having their vertex angles equal to 60*^.Ex. 502. Construct a triangle, having given &, 7^6, and B. 152 PLAXE GEOMETRY Proposition XXIII. Theorem 377.… … Griven two chords AB and CD, intersecting at E,To prove that Z1 9? i (^BD + AC). Argument 1. Draw AD. 2. Z1=Z2 + Z3. 3. Z 2 oc 1, i^. 4. Z 3 0? i 5^.6. .-. Z 2 + Z 3 cc ^ (5i) + 2c). 6. .•. Z 1 2 i {BD + AC). Q.E.D. Reasons 1. §54,15. 2. §215. 3. § 365.4 §365. 5. §362,6. 6. §309. Ex. 503. One angle…
Geometry, Plane · Geometry, Solid
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