# Parallel Lines and Real Life by yaofenjin

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```									Parallel Lines
□ 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.
Review
For today’s lesson, you
must find a pair of
alternate interior angles
to prove that the lines
are parallel.

In this diagram, name a
set of alternate interior
angles.
Can you find
a set of
parallel lines
in this
picture?
<1   <2

Drag these two angles
onto the picture to show
alternate angles.
□ These lines
appear to
be parallel.

<2   <1
Directions
□ 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.
<1
<2
<1
<2
<1
<2
<1
<2
<1
<2
<1
<2
<1
<2
<1
<2
<1
<2
<1
<2
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
Lastname_parallel_sketch.
□ Make sure a copy is placed in my drop
folder when complete.
Category            4                3              2              1
Image       Personal image                                       Used
used                                        directly from
the teacher
PowerPoint

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
drawn.
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.
description.

```
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