# mtbos iteachmath geometry proof math edtech poster ipad typography sketching graphics triangle circle tangent isosceles midpoint reasoning quadrilateral bisectors concurrency

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

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2019-07-30