What does concurrent mean for lines?, They meet at one point., They are all parallel., They never meet., What is a median of a triangle?, A line that divides an angle into equal parts, A line perpendicular to a side at its midpoint, A line from a vertex to the midpoint of the opposite side, Where do the three medians meet?, At the orthocentre, At the centroid, At the incentre, What is an altitude of a triangle?, A line joining the midpoints of two sides, A line that always divides an angle equally, A line through a vertex perpendicular to the opposite side's line, Where do the three altitudes meet?, At the orthocentre, At the circumcentre, At the centroid, What does an angle bisector do?, Joins two vertices, Divides an angle into two equal parts, Divides every side into three parts, Where do the three internal angle bisectors meet?, At the orthocentre, At the incentre, At the circumcentre, What is a perpendicular bisector of a side?, A line joining the side's endpoints, A perpendicular line through the side's midpoint, A line through a vertex parallel to that side, Where do the three perpendicular bisectors meet?, At the circumcentre, At the centroid, At the incentre, Which point is equally distant from all three vertices of a triangle?, The orthocentre in every triangle, The incentre in every triangle, The circumcentre

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