Little explorations with HP calculators (no Prime)

03292017, 11:49 AM
(This post was last modified: 03292017 11:50 AM by pier4r.)
Post: #69




RE: Little explorations with the HP calculators
(03292017 11:31 AM)Han Wrote: Have you considered the sum of the angles in a triangle and a quadrilateral, and properties of vertical angles? Yes I considered the angles in a triangle (180) and quadrilateral (360), I considered that an angle is the same when opposite or the complementary that have a sum of 180. Unless I missed some internal shape, I got all the possibilities of which I'm aware of. What I did see after your question is the concave pentagon. And maybe this will help. Wikis are great, Contribute :) 

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