1.	A _________ is a line or segment that passes through the midpoint of a side of a triangle and is perpendicular to that side.
		A.	perpendicular bisector	B.	angle bisector
		C.	mode	D.	median
		Hint
	2.	In which figure is a median and an angle bisector of and is an altitude?
		A.		B.
		C.		D.
		Hint
	3.	In which picture is an angle bisector?
		A.		B.
		C.		D.
		Hint
	4.	The segment that has one endpoint at one of the vertices of a triangle and its other endpoint on a line containing the opposite side of the triangle, and is perpendicular to the opposite side of the triangle, is called the __________.
		A.	angle bisector	B.	median
		C.	perpendicular bisector	D.	altitude
		Hint
	5.	The __________ is the point of concurrency of the angle bisectors of a triangle.
		A.	circumcenter	B.	incenter
		C.	centroid	D.	orthocenter
		Hint