1346.BPW 3.5 Parallel Lines, Transversals, Angle Sums.pptx
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Transcript 1346.BPW 3.5 Parallel Lines, Transversals, Angle Sums.pptx
Math CC7/8 – Be Prepared
On Desk:
Learning Log:
1. Pencil
2. Protractor
3. Math Journal
4. BPW Learning Log
1. HW: p. 65, #11-15, 24, 25
2. BPW Quiz – Wed. 5/25 (Retake Wed. 6/1)
3. BPW Small Test – Thursday, 6/2 (No Retake!)
4. Final Assessment – Th 6/9 & Fri. 6/10
Tasks for Today
• Warm Up– Congruent Triangles
• Lesson 3.5 – Parallel Lines,
Transversals & Angle Sums
Warm Up
With the given information are the two triangles congruent?
Explain.
Yes, ASA proves
congruence
No, AAA is NOT enough to prove
congruence (But it will prove similarity)
They are opposite or vertical angles formed
when two lines intersect.
They are opposite or vertical angles formed
when two lines intersect.
Sliding, or translating line n along line t
will take line n onto parallel line m, so
the sides of angle 5 will be “moved”
onto those of angle 1.
The two images of AC are
each parallel to AC, and
they share an endpoint, B.
So, they must lie in one
straight line, since there is
only one line through B
parallel to AC.
The angles 1, 2, and 3
make a straight angle at B
as shown.
Yes! There was nothing specific about this triangle, and the
characteristics of half-turns we used are always true.