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[HM] Nested inscribed perspective triangle theorem: Whose?
Posted:
Jan 13, 2000 3:32 PM


The following theorem is stated on page 165 of N. AltshillerCourt's book, College Geometry:
"The triangle (Q)=DEF is inscribed in the triangle (P)=ABC, and the triangle (R)=KLM is inscribed in (Q). Show that if any two of these triangles are perspective to the third, they are perspective to each other."
Can we determine the earliest publication of this fruitful theorem?
Clark Kimberling



