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Warm-UP 3/13/14
Read and Think about the following statistics. Then, answer the questions
below:
10% of students in low-income communities who decide to go to college
actually graduate from college.
50% of students in low-income communities will not graduate from high
school by the time they're 18 years old.
Considering the fact that Morrow High School is located in what the state
determines to be a low-income community, how do these statistics make
you feel? What will you do for the remainder of this year to ensure that as
a student in a low-income community, you will not be another statistic?
Now that you have just taken your unit 1 test, what specifically will you do
in this class from this point forward to ensure that you will not be another
statistic?
Agenda
• Review Do Now
• Vocabulary
• Activity
Standard
• MCC9-12.G.CO.1 Know precise definitions of
angle, circle, perpendicular line, parallel line,
and line segment, based on the undefined
notions of point, line, distance along a line,
and distance around a circular arc.
Students Will Be Able to…
• Define angle, circle, perpendicular line,
parallel line, and line segment.
• Understand the concept of point, line, and
distance along a line and around a circular arc.
Point
An exact position or location in a given plane.
Is represented by a dot and named with a capital letter.
Point A
or
Point B
Line
The set of points between points P and Q in a plane and
the infinite number of points that continue beyond the
points.
Written as P Q
Q
P
Line Segment
A line with two endpoints.
Written as A B
Collinear
• Points are said to be collinear if they lie on a
single straight line. P1, P2, and P3 would be
said to be collinear.
Ray
A line that has one endpoint and continues on forever in
the opposite direction.
Circle
• The set of points on a plane at a certain distance,
or radius, from a single point, the center
Angle
Made up of 2 rays joined together at a common point
called a vertex.
The angle is
 ABC
Perpendicular Line
Two lines that intersect at a right angle (90°).
Written as A B  P Q
Parallel Line
Lines in a plane that either do not share any points and
never intersect, or share all points.
Written as A B P Q
A
B
P
Q
Distance along a line
The linear distance between two points on a given line.
How far apart are the points on the
line segment?
How far apart are the points on
the line segment?
Hmmm…
Degrees
The unit of measure for angles.
Acute Angle
An angle measuring less than 90° but greater than 0°.
Right Angle
An angle that measures 90°.
Obtuse Angle
An angle measuring greater than 90° but less than 180°.
Straight Angle
An angle measuring exactly 180°.
Adjacent Angles
Two angles that share a common vertex and side.
SIDE BY SIDE
Vertical Angles
Two angles directly across from each other. They share
a common vertex.
e
h
f
g
Linear Pair
Two adjacent angles that form a straight line.
1
2
Complementary Angles
Two angles that add up to 90 degrees.
3 0
6 0
1
2
Supplementary Angles
Two angles that add up to 180°.
1
2 0
1 6 0
2
Guided Practice: Check out the “Radical Rick’s
Speedway” Logo
and do the following… (10 minutes)
• Identify a line in the submitted
logo.
• Identify a ray in the submitted
logo.
• Identify a line segment in the
submitted logo.
• Identify 2 pairs of parallel lines in
the submitted logo.
• Identify 1 pair of perpendicular
lines in the submitted logo.
Independent Practice:
Design Your Own Logo
• It must include the following:
– 4 Angles (one obtuse, one acute, one straight, one
right)
– Circle
– Line Segments
– Rays
– Parallel lines
– Perpendicular line
• Make sure these pieces are all LABELED.
Independent Practice
• Worksheet
Homework
• Finish Independent Practice

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