DO NOW Bell Work – do 4 boxes on page 3 of note-taker While you are waiting for you computer/LEARN to log on… o TURN in Parallel City assignment o TURN.

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Presentation transcript:

DO NOW Bell Work – do 4 boxes on page 3 of note-taker While you are waiting for you computer/LEARN to log on… o TURN in Parallel City assignment o TURN in any homework & Extra Credit o Get out notebooks for notes

REMEMBER!!! ANY & ALL ASSIGNMENTS ARE DUE MONDAY, 10/6/2014 GEOMETRY MID-TERM & PERFORMANCE TASK WEDNESDAY, 10/8/2014

3-5 Parallel & Perpendicular Lines Objective: Relating parallel and perpendicular lines Homework 3-5 On MathXL or LEARN

Auxiliary Line A line you ADD to a diagram to help explain relationships in a proof.

If I divide a straight angle (180°) into 3 angles, I get this figure… 3 angles all sharing a vertex… 1 3 2

What if I don’t give them a common vertex? On a straight line? What shape would they make? Talk about it with your group…draw a picture on your board to share with the class.

Triangle Angle Sum A triangle interior angles add up to equal… 13 2

Practice – on boards – What is the missing angle measurement?

Exterior angle of a polygon is an ANGLE formed by a side and the extension of an adjacent side. Exterior angle of a polygon

Remote Interior Angles Are the 2 NON-adjacent ANGLES inside the triangles Remote Interior <s

Exterior Angle Theorems A

Practice Examples Find the missing measures.