Warm-upwith 2.6 Notes

Answer each of the questions. Draw a picture to supportyour answer.

1) What type(s) of triangles have more than one line ofsymmetry?

2) If D is the midpoint of and C is the midpoint of ,What is the length of if BD = 12 cm?

3) How many squares (any size) are then in a 4 x 4 grid? Hint: There are more than 16?

AC BDAC

H.W. Answers to page 124 and 125 #1-10

More Answers to homework

Student of the day!Block 1

Student of the day!Block 3

2.6 Special Angles on Parallel Lines

Investigation: Use the ruler to draw two lines that are notparallel. Then draw a line that intersects them both (atransversal).

Measure all the angles and write down the angle measures.Do you see any relationships?

2.6 Special Angles and Parallel Lines continued…• Now draw a pair of parallel lines. Use the top andbottom of your ruler. Then draw a transversal.

Notice any special angle relationships.

Practice Problem

2.6 Conjectures

C-3a Corresponding Angle Conjecture or CA ConjectureIf two parallel lines are cut by a transversal, thencorresponding angles are _________.

C-3b Alternate Interior Angle Conjecture of AIA ConjectureIf two parallel lines are cut by a transversal, then alternateInterior angles are ________.

C-3c Alternate Exterior Angle Conjecture or AEA ConjectureIf two parallel lines are cut by a transversal, then alternateexterior angles are _________.

2.6 Conjectures continued…C-3 Parallel Lines Conjecture If two parallel lines are cut by a transversal, then thecorresponding angles are _______, the alternate interiorangles are _____ , and the alternate exterior angles are_______ .

C-4 Converse of the Parallel Lines ConjectureIf two lines are cut by a transversal to form pairs ofcongruent corresponding angles, congruent alternateinterior angles and congruent alternate exterior angles, thelines are ___________ .

Directions for Quiz

• Work silently on your quiz. • When you are finished flip your quiz over in frontof you and work on the homework.• The homework is pg 131 to 133 #1 – 10 and then#14 – 16 all the problems.• Notebook check starts next class. You need to haveall 8 conjectures (which include the slope formula)and all 8 notes with warm-ups starting with Ch. 1Review and ending with Algebra Review #2.10 pts/notes(including warm-up) = 80pts2pts/conjecture 2x 8 = 16 pts