Points of Concurrency
 The 3 altitudes of a triangle intersect at the centroidorthocenterincentercircumcenter The 3 medians of a triangle intersect at thecentroidorthocenterincentercircumcenter The 3 perpendicular bisectors of a triangle intersect at thecentroidorthocenterincentercircumcenter The 3 angle bisectors of a triangle intersect at the centroidorthocenterincentercircumcenter It is equidistant from the three vertices of the trianglecentroidorthocenterincentercircumcenter It is equidistant from the three sides of the trianglecentroidorthocenterincentercircumcenter It divides each median into 2 sections 2:1,  2/3 - 1/3centroidorthocenterincentercircumcenter medianangle bisectorperpendicular bisectoraltitude medianangle bisectorperpendicular bisectoraltitude medianangle bisectorperpendicular bisectoraltitude medianangle bisectorperpendicular bisectoraltitude medianangle bisectorperpendicular bisectormidsegment medianangle bisectorperpendicular bisectoraltitude medianangle bisectorperpendicular bisectoraltitude orthocentercentroidincentercircumcenter orthocentercentroidincentercircumcenter orthocentercentroidincentercircumcenter BAAB is 30, how long is the purple line? 3060orthocentercentroidincentercircumcenter perpendicular bisector-angle bisector ----altittude --------median ---------orthocenter?circumcenter?centroid?incenter?
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