Define Parallel Lines : ___________________________________________________

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Construct a horizontal segment AB. Construct a slanted segment CD that intersects segment
AB. Choose each segment, construct "point at intersection", label as X. Choose segment CD,
construct "point on object" ( make sure this point is below point X), label as Y. Choose segment
AB and point Y, construct "parallel line". Choose this line, construct "point on object" (make sure this point is to the left of point Y), label as point M. Choose the line again, construct "point on object" (make sure this point is to the right of point Y), label as point N. Choose points M and N, construct "segment". Choose the line outside of segment MN, go to display and "hide line".

This picture should look like this:

Segment CD is a transversal. Define transversal : __________________________________

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Angles 3, 4, 5 and 6 are "interior angles".
Angles 1, 2, 7, and 8 are "exterior angles".

Name all the pairs of vertical angles : ___________________________________________

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Measure the following angles.

m<1 = _______ m<2 = _______ m<3 = _______ m<4 = _______

m<5 = _______ m<6 = _______ m<7 = _______ m<8 = _______

Angles 3 and 6, 4 and 5 are alternate interior angles.
What can you conclude about the measures of these angles? ___________________________

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Angles 3 and 5, 4 and 6 are consecutive interior angles.
What can you conclude about the measures of these angles? ___________________________

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Angles 1 and 8, 2 and 7 are alternate exterior angles.
What can you conclude about the measures of these angles? ___________________________

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Angles 1 and 5, 2 and 6, 3 and 7 , and 4 and 8 are corresponding angles.
What can you conclude about the measures of these angles? ___________________________

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Construct <AXD such that it measures 90 degrees. What can you conclude about the other angles that are formed by the parallel lines and the transversal? _______________________________

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Define skew lines : __________________________________________________________

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Give a real life example of :
1. Skew lines -




2. Parallel lines -