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3.3 prove lines are parallel

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This geometry lesson discusses parallel lines and how to prove they are parallel using angle properties such as corresponding angles, alternate interior angles, and consecutive interior angles. It includes examples of parallel line problems and checkpoints for students to practice identifying parallel lines using angle measures. The document provides guided practice problems for students to determine if lines are parallel.

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MR. SAUCEDO GEOMETRY MILBY HIGH SCHOOL 3.3 Prove that lines are parallel
REVIEW FOLDABLE ACTIVITY You will neeed: Foldable sheet Color pencils
CORRESPONDING ANGLES FACTS: They are congruent They slide down and up in the same position.
ALTERNATE INTERIOR ANGLES FACTS They are congruent
ALTERNATE EXTERIOR ANGLES FACTS They are congruent.
CONSECUTIVE INTERIOR ANGLES FACTS: THEY ADD UP TO 180 DEGREES.
OTHER REMINDERS Parallel Perpendicular Supplementary Complementary
CHECKPOINT Angle 2 and 4 are congruent. SMART Response Que To set the properties right click and select SMART Response Question Object->Properties...
CHECKPOINT Angles P and Q are corresponding angles. SMART Response Ques To set the properties right click and select SMART Response Question Object->Properties...
Angles R and K are Alternate interior SMART Response Ques To set the properties right click and select SMART Response Question Object->Properties...
CHECKPOINT If angle R is 70 degrees, then angle Q is 110 degrees. SMART Response Ques To set the properties right click and select SMART Response Question Object->Properties...
BIG QUESTION If <4<3, can we say that lines e and f are parallel? SMART Response Ques To set the properties right click and select SMART Response Question Object->Properties...
QUESTION If m<H=110, what does angle M need to be so that line Q ll R? If m<K=30, what does angle O need to be so that line Q ll R?
CHECKPOINT If m<O=100, what does m<J have to be in order that Q ll R. SMART Response Question To set the properties right click and select SMART Response Question Object->Properties...
GUIDED PROBLEM Are lines AB and CD parallel? SMART Response Question To set the properties right click and select SMART Response Question Object->Properties...
QUESTION If m<3 m<5, are lines DK and GH parallel? SMART Response Que To set the properties right click and select SMART Response Question Object->Properties...
GUIDED PROBLEM What does x have to be so that lines l and m be parallel?
CHECKPOINT What does x have to be so that lines AB and CD be parallel? SMART Response Question To set the properties right click and select SMART Response Question Object->Properties...
MORE PRACTICE WORK PROBLEMS: Page 159: problems 27, 29, 31 & 38. Page 165: problems 4, 6, 8, 10, 14.

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3.3 prove lines are parallel