Download Section 4.7

Do Now
Suppose that
XYZ is congruent to
Complete each statement:
RST.
1. XY is congruent to _________.
2. ˂ Z is congruent to ________.
3. Measure of angle S is equal to ________.
4. If m˂ A is congruent to m ˂ B,
m˂ A=(2x +40), and m ˂ B =(3x – 10) find x.
Geometry
Section 4.7
Objective:
Use Congruent Triangles
SWBAT use congruent triangles to
prove corresponding parts congruent. (CPCTC)
CPCTC
If two triangles are congruent to each other
then all corresponding sides and angles are
congruent to each other.
Example: Determine if triangle ABC is
congruent to triangle DEF. If yes, explain why
and state all congruent parts.
A
B
D
C E
F




CPCTC
Prove:
A
B
C
A
D
D