# mtbos iteachmath geometry proof math edtech collinearity poster ipad typography sketching graphics triangle circle circumcircle perpendicular school teaching squares vertices midpoint euclid tangent isosceles reasoning orthocenter circumcircles congruence teacher quadrilateral bisectors concurrency incenter excircle altitude

Not quite, but close! Here: no special fx, and each polygon kind has the same color. There are 6 collinear sides on the outer part. And the 42-gon is slightly irregular, with 6 angles slightly sharper than the others.

0 5
2022-11-11

Here, we have a right triangle with its incircle, excircle, & points of tangency to be shown. How can we prove the collinearity among the 3 points (shown at the end)? (Source: ). https://t.co/CGNxP7i5Hz

16 32
2019-07-30