Median, A line joining a vertex to the midpoint of the opposite side., Altitude, A line joining a vertex and perpendicular to the opposite side., Angle bisector, A line dividing an angle into two equal angles., Perpendicular bisector, A line cutting a side into two equal parts at 90°., Concurrent, Lines meeting at one point., Centroid, The point where three medians meet., Orthocentre, The point where three altitudes meet., Circumcentre, The point where three perpendicular bisectors meet.

U8.1

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