Transcript Glencoe Geometry

Content Standards
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.
G.CO.12 Make formal geometric constructions with a
variety of tools and methods (compass and straightedge,
string, reflective devices, paper folding, dynamic
geometric software, etc.).
Mathematical Practices
5 Use appropriate tools strategically.
6 Attend to precision.
You measured line segments.
• Measure and classify angles.
• Identify and use congruent angles and the
bisector of an angle.
• Ray
a part of a line that has one endpoint
and then extends infinitely in the other
direction
**Name always
begins with the
endpoint
• Opposite rays
choose a point on a line and either side
are called opposite rays
• Angle
formed by two noncollinear rays (sides)
that have a common endpoint (vertex)
• Interior
“inside the angle”
• Exterior
“outside the angle”
• angle bisector
a ray that divides an angle into 2
congruent angles
Angles and Their Parts
A. Name all angles that
have B as a vertex.
Answer:
Angles and Their Parts
B. Name the sides of 5.
Answer:
Angles and Their Parts
C.
A.
A.
B.
C.
D.
B.
A.
B.
C.
D. none of these
C. Which of the following is another name for 3?
A.
B.
C.
D.
Measure and Classify Angles
A. Measure TYV and classify it as right, acute,
or obtuse.
Measure and Classify Angles
Measure and Classify Angles
Measure and Classify Angles
INTERIOR DESIGN Wall stickers of standard shapes
are often used to provide a stimulating environment
for a young child’s room. A five-pointed star sticker
is shown with vertices labeled. Find mGBH and
mHCI if GBH  HCI, mGBH = 2x + 5, and
mHCI = 3x – 10.