Students learn the definition of an obtuse angle. They drag the ray of an angle to make it obtuse. Then, they determine if a given angle is obtuse
A. Identify and label points and line segments
B. Identify and label lines
C. Identify and label rays
D. Review line segments, lines, and rays
E. Identify the parts of an angle
F. Name angles
G. Identify the number of angles in polygons
H. Explore right angles
I. Use a drafting triangle to determine if an angle is right
J. Identify the number of right angles in a polygon
K. Explore acute angles
M. Use a drafting triangle to determine the type of angle (Level 1)
N. Use a drafting triangle to determine the type of angle (Level 2)
O. Classify angles
P. Classify the angles of a polygon
Q. More practice with line segments, rays, and lines
R. Identify acute triangles
S. Identify obtuse triangles
T. Identify right triangles
U. Identify perpendicular lines
V. Identify parallel lines
W. Classify types of lines
X. Identify perpendicular or parallel line segments in a figure (Level 1)
Y. Identify perpendicular or parallel line segments in a figure (Level 2)
Z. Classify lines (Level 1)
AA. Review types of triangles
AB. Classify lines (Level 2)