Transcript 10 2 Congruence

10-2: Congruence
Objectives:
1. To determine
whether figures are
congruent
Assignment:
• P. 138: 19-22
• P. 140: 8-11
Objective 1
You will be able to
determine whether
figures are
congruent
Warm-Up
1. What does it mean
for two triangles to
be congruent?
2. If a contractor was
building a house,
how could she or he
check to see if all of
the roof trusses,
which are triangles,
were identical?
Warm-Up
1. What does it mean
for two triangles to
be congruent?
2. If a contractor was
building a house,
how could she or he
check to see if all of
the roof trusses,
which are triangles,
were identical?
Congruent Polygons
Congruent Triangles (CPCTC)
Two triangles are congruent triangles if and
only if the corresponding parts of those
congruent triangles are congruent.
Corresponding
sides are
congruent
Corresponding
angles are
congruent
Congruence Statement
When naming two congruent triangles, order
is very important.
Exercise 1
Write a congruence statement for the
congruent triangles below.
Exercise 2
U
Locate points I
and S so that
BLUE  FISH.
6
E
4
2
B
S
-5
5
H
-2
-4
F
L
I
Congruence Transformations
Two figures
are congruent
if and only if a
composition of
rigid motions
maps one to
the other.
Properties of Congruent Triangles
10-2: Congruence
Objectives:
1. To determine
whether figures are
congruent
Assignment:
• P. 138: 19-22
• P. 140: 8-11