Medians, Altitudes, Perpendicular Bisectors, Angle Bisectors

Triangle ABC has a median of AD where the centroid is labeled Y.  If AY = 18, find the length of YD and AD in that order.

• 6 and 12

• 9 and 27

• 36 and 54

• 18 and 36

What is the point of concurrency of the perpendicular bisectors of a triangle?

• Circumcenter

• incenter

• orthocenter

• centroid

What is the point of concurrency for the median of a triangle?

• circumcenter

• centroid

• incenter

• orthocenter

These types of lines do NOT have to go through the vertex?

• altitudes

• median

• angle bisectors

• perpendicular bisectors

6. The point of concurrency of ANGLE BISECTORS is....

• equidistant from the vertices

• outside the triangle

• called the circum center

• equidistant from the sides of the angle

What type of lines have a point equidistant from the vertices of a triangle?

• altitudes

• angle bisectors

• median

• perpendicular bisectors

What type of lines create a point 2/3 the distance from the vertex and 1/3 from the side?

• median

• perpendicular bisector

• altitude

• angle bisector

A segment from the vertex of a triangle to the opp. side that splits the angle into 2 equal angles.

• incenter

• angle bisector

• perpendicular bisector

• circumcenter

What type of lines are shown

• perpendicular bisectors

• medians

• altitudes

• angle bisectors

what type of lines are shown:

• perpendicular bisector

• angle bisectors

• altitudes

• medians