The document is notes from a geometry class that: 1) Asks students if a triangle with a perimeter of 32 is scalene, isosceles, or equilateral and provides an example triangle. 2) Lists the agenda for the class which includes turning in homework, discussing homework questions, learning about theorem 3-7, having an exit slip activity, and partner discussion. 3) Presents homework questions involving proving triangles are congruent based on equal angles or sides.

1. Geom3­7.notebook October 21, 2011
BELL WORK:
If the perimeter of EFG is 32, is EFG
scalene, isosceles, or equilateral?
E
10 x+7
F 2x­3 G
`
Agenda for the day:
• turn in p.139 #2,3,5,8,9
• homework questions
• 3­7
• exit slip
• discussion in partners
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2. Geom3­7.notebook October 21, 2011
Homework questions? (p.144 #3,7,9,10)
A
Given: AB = AD
BAC = DAC
Prove: B = D
B C D
2

3. Geom3­7.notebook October 21, 2011
A
So, if we know that a triangle is
isosceles, what do we know about 2
of the angles?
B C D
"base angles"
What if we know that a triangles has
at least 2 congruent angles?
Ways to prove that a triangle is isosceles:
3

4. Geom3­7.notebook October 21, 2011
equilateral vs. equiangular
ONLY works for triangles
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5. Geom3­7.notebook October 21, 2011
W
EXIT SLIP:
X
WX and QX are radii
m W = 36 Q
Find m Q
Find a partner near you and discuss
sample problems 2 and 3 on p.151.
I will walk around to answer questions.
HOMEWORK: p.152 #2­4,10,11,15
Due Tuesday
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