DO NOW• Bell Work – do 4 boxes on page 3 of note-taker•While you are waiting for you computer/LEARN to log on…oTURN in Parallel City assignmentoTURN in any homework & Extra CreditoGet 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 LinesObjective:

Relating parallel and perpendicular lines

Homework 3-5On 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 32

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…

1 3

2

M<1+M<2+M<3=

180°

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

321 mmm

A

1801 Amm

Practice Examples

Find the missing measures.