Geometry Problem. Post your solution in the comment box below.

Level: Mathematics Education, High School, Honors Geometry, College.

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## Sunday, October 2, 2016

### Geometry Problem 1271 Triangle, Incircle, Incenter, Excircle, Excenter, Escribed Circle, Tangency Points, Six Concyclic Points

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This result is obvious as per Problem 1269 and 1270 since AC subtends 90 degree angles at each of the 4 points A1, C1, A2 and C2.

ReplyDeleteProblem 1271

ReplyDeleteIs <AA_1C=90=<AC_1C=<AA_2C=<AC_2C.Therefore the points A,C_1,A_1,C,C_2 and A_2 are concyclic.

APOSTOLIS MANOLOUDIS 4 HIGH SCHOOL KORYDALLOS PIRAEUS GREECE