Pc Identify Lines
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DEFINING LINES a MATH PROJECT
1. Use you protractor and straightedge to create 65°, 90° & 119° angles. Label each as acute, obtuse, or right. 2. Make a 126° angle. Label it ∠ BIG. Create angle bisector IF.
Defining Line & Angle Relationships 1. 2.
Objectives: Define special line & angle relationships. Learn more vocabulary.
Parallel Lines
l
Not Parallel Lines
m a
b
q
p
Definition of parallel lines: - coplanar lines that never cross
Parallel Lines - if you see these symbols, the lines are parallel
Perpendicular Lines
m
n
c
Not Perp. Lines
d
Definition of perpendicular lines: -lines that meet @ 90 degree angles
Pairs of Comp.
m
l+m
‘s Not Comp.
‘s
2 = 90
def: Pairs of Complimentary Angles-
2
‘s whose measures add to 90°
Pairs of Supp.
l&
‘s Not Supp.
‘s
2 = are supp.
def: Pairs of Supplimentary Angles2 ‘s whose measures add to 180
Vertical Angles
Not Vertical Angles
-angles c & d are vertical angles. -angles 1&2 and 3&4 are not vertical:
Definition of vertical angles:
-angles sharing a vertex directly
across from each other
Linear pairs of
‘s
Not L.P. of
‘s
-angles 1&2 and 3&4 are L.P. of angles.
Definition of linear pairs of angles: -2 angles that form a straight line
1. Use you protractor and straightedge to create 65°, 90° & 119° angles. Label each as acute, obtuse, or right. 2. Make a 126° angle. Label it ∠ BIG. Create angle bisector IF.
Defining Line & Angle Relationships 1. 2.
Objectives: Define special line & angle relationships. Learn more vocabulary.
Parallel Lines
l
Not Parallel Lines
m a
b
q
p
Definition of parallel lines: - coplanar lines that never cross
Parallel Lines - if you see these symbols, the lines are parallel
Perpendicular Lines
m
n
c
Not Perp. Lines
d
Definition of perpendicular lines: -lines that meet @ 90 degree angles
Pairs of Comp.
m
l+m
‘s Not Comp.
‘s
2 = 90
def: Pairs of Complimentary Angles-
2
‘s whose measures add to 90°
Pairs of Supp.
l&
‘s Not Supp.
‘s
2 = are supp.
def: Pairs of Supplimentary Angles2 ‘s whose measures add to 180
Vertical Angles
Not Vertical Angles
-angles c & d are vertical angles. -angles 1&2 and 3&4 are not vertical:
Definition of vertical angles:
-angles sharing a vertex directly
across from each other
Linear pairs of
‘s
Not L.P. of
‘s
-angles 1&2 and 3&4 are L.P. of angles.
Definition of linear pairs of angles: -2 angles that form a straight line
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