□ Task: Today you will identify parallel
lines in real life images. You will also
identify a transversal and a set of
alternate interior angles.
□ To prove the lines are parallel, you will
use Geometer’s Sketch pad to
measure the alternate interior angles.
For today’s lesson, you
must find a pair of
alternate interior angles
to prove that the lines
In this diagram, name a
set of alternate interior
Can you find
a set of
Drag these two angles
onto the picture to show
□ These lines
□ There are 10 slides for you to choose
from. You must complete 6 slides out
of the 10. Use the line tools to draw
parallel lines and a transversal on the
images. Then, label one pair of special
angles. Each slide will give you the
type of angles to identify.
Save your work!
□ Now that you are done, save your work in
your I drive. Save as Lastname_parallel
□ The next step is to measure the angles to
check to see if they are congruent.
□ Paste 1 of your images in Geometer’s Sketch
pad and measure the two angles for
congruency. You should save your
sketchpad image to your I drive as
□ Make sure a copy is placed in my drop
folder when complete.
Category 4 3 2 1
Image Personal image Used
used directly from
Sketchpad Drew and Drew Some parts Incorrect
labeled parallel of parallel drawing.
parallel lines, lines, lines,
transversal, transversal, transversal,
and a pair of and a pair and a pair
special angles. of special of special
angles. angles are
Proving Detailed Explanation Weak No
the lines explanation of of why the explanation explanation.
parallel. why the lines lines are or of why the
are or are not are not lines are or
parallel. parallel. are not
Includes Geometric parallel. No
geometric terms used. Geometric
terms and terms used.