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10-82.

Jamie was supposed to have completed a portfolio of geometric constructions during spring break. She started this construction of a triangle center on the first day of her vacation and then forgot about it. Help her complete her portfolio entry. What is the name of the triangle center that Jamie constructed (point )? What special properties does it have? 

Use the glossary to look up centroid, circumcenter and incenter.

Triangle A,R,T, with 2 dashed lines, intersecting inside the triangle, at a point labeled, x. 1 line is perpendicular to side, RT, & goes through vertex, A, & 1 line is perpendicular to side, AT.