Find the value of x. x째 9
15
25째 15
1. 80 2. 45 3. 53 4. 11 5. 5 6. 6 7. 41
Objective: Draw medians, altitudes and perpendicular bisectors.
ď‚— A segment from a vertex to the midpoint of the
opposite side of a triangle
ď‚— Draw all possible medians of the following:
ď‚— The perpendicular segment from a vertex to the line
containing the opposite side of a triangle.
ď‚— Draw all possible altitudes of the following:
Right Triangle Two altitudes are the sides One is in the middle of the triangle
Obtuse Triangle Two altitudes are outside the triangle One altitude is inside the triangle
ď‚— A line perpendicular to a segment at its midpoint
ď‚— If a point lies on the perpendicular bisector of a
segment, then the point is equidistant from the endpoints of the segment. A
C
B m
ď‚— Meaning: If m is the perpendicular bisector of BC,
then AB = AC (or A is equidistant from B and C).
ď‚— If a point is equidistant from the endpoints of a
segment, then the point lies on the perpendicular bisector of the segment. A
C
B m
ď‚— Meaning: If AB = AC, then m is the perpendicular
bisector of BC.
ď‚— If a point lies on the bisector of an angle, then the
point is equidistant from the sides of the angle. A P
C
D
B
ď‚— Meaning: If point P lies on CD (which is an angle
bisector), then P is the same distance from ____ and ____.
If a point is equidistant from the sides of an angle,
then the point lies on the bisector of the angle. A P
C
D
B
Meaning: If AP = PB, then CD bisects ∠ACB.
1.Worksheet 4-7 2.Chapter 3 Review WS 3.Test Thursday!