Download Geometry - Blue Valley Schools

Geometry
Lesson 3.1
Name ___________________________
1. In the figure above, AB || CD, with transversal EF. Measure all of the
angles (#1-8) using your protractor and record the measurements below:
m1=__________ m2=__________ m3=__________ m4=__________
m5=__________ m6=__________ m7=__________ m8=__________
2. List the pairs of corresponding angles.
_______________
_______________
_______________
_______________
_______________
_______________
_______________
_______________
What do you notice about their measures?
3. List the pairs of alternate interior angles.
_______________
_______________
What do you notice about their measures?
4. List the pairs of alternate exterior angles.
_______________
_______________
What do you notice about their measures?
5. List the pairs of same-side interior angles.
_______________
_______________
What do you notice about their measures?
6. List the pairs of same-side exterior angles.
_______________
_______________
What do you notice about their measures?
Make some conjectures:
 If two parallel lines are cut by a transversal, then the corresponding
angles that are formed are _________________________.

If two parallel lines are cut by a transversal, then the alternate interior
angles that are formed are _________________________.

If two parallel lines are cut by a transversal, then the alternate exterior
angles that are formed are _________________________.

If two parallel lines are cut by a transversal, then the same-side interior
angles that are formed are _________________________.

If two parallel lines are cut by a transversal, then the same-side
exterior angles that are formed are _________________________.
Try it!
Given that l || m, m1=98°, and m2=40°, find the measure of each angle
below.