3.3 prove lines are parallel
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Transcript of 3.3 prove lines are parallel
MR. SAUCEDOGEOMETRY
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 QuestionTo set the properties right click and selectSMART Response Question Object->Properties...
CHECKPOINT
Angles P and Q are corresponding angles.
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Angles R and K are Alternate interior
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CHECKPOINT
If angle R is 70 degrees, then angle Q is 110 degrees.
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BIG QUESTION
If <4≈<3, can we say that lines e and f are parallel?
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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.
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GUIDED PROBLEM
Are lines AB and CD parallel?
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QUESTION
If m<3 ≈ m<5, are lines DK and GH parallel?
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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 QuestionTo set the properties right click and selectSMART Response Question Object->Properties...
MORE PRACTICE
WORK PROBLEMS:
Page 159: problems 27, 29, 31 & 38.
Page 165: problems 4, 6, 8, 10, 14.