1. Geom3­3Final.notebook October 07, 2011
BELL WORK:
Name the additional congruent sides or angles needed to prove
that the triangles are congruent by each specified postulate.
a) SSS
b) SAS
A D
B C E F
Agenda for the Day:
• sample problems from 3.2
• lesson 3.3
• exit slip
• assign 3.2/3.3 homework
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2. Geom3­3Final.notebook October 07, 2011
p.118 #2 p.118 #3
p.118 #4 p.118 #5
p.119 #6
1­5, are you getting this?
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3. Geom3­3Final.notebook October 07, 2011
p.119 #7
1­5, are you getting this?
3.3 CPCTC and Circles
By the end of this lesson, you should be able to:
1. Use CPCTC in proofs.
2. Apply basic properties of circles.
A D
B C E F
If the above triangles are congruent, is C = F?
CPCTC ­ Corresponding parts of congruent triangles are congruent.
*You will use CPCTC in the "reasons" column of
proofs dealing with triangles.
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4. Geom3­3Final.notebook October 07, 2011
Circles:
• Circles are named by the center point.
This is circle P. ( P) P
• The circle is technically only the outer
line ­ not the space in the center. A
• Every point on the circle is the same
distance from the center of the circle. C
• PA is a radius.
• PA and PC are called radii.
• All radii of a circle are congruent.
• Area =
• Circumference =
EXIT SLIP: p.127 #7
HOMEWORK: p.120 #1­6,8,11,12
p.127 #1­6
Due NEXT WEDNESDAY
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