Transcript Review of 4.1

Review of 4.1-4.3
CONGRUENT TRIANGLES
Question #1
 Find the value of x. Then classify the triangle by its
angles.
3x - 25
2x +7
5x - 2
X= 20
OBTUSE
Question #2
 Find the value of x.
2x + 9
123 – 5x
7x + 12
X=12
Question #3
 Find the values of x and y.
38
7x + 1
10x + 9
y
X=10
and
Y=71
Question #4
 Classify the triangle by its sides.
 A(-2,5)
 B(3,-1)
 C(0,4)
AB 
61
BC 
34
AC 
5
SCALENE
Question #5
 In the figure, W O G  P A N
 Find M  P
G
P
82
W
N
O
55
A
43
Question #6
A B C  H JK
 In the figure,
 Find x and y.
H
B
K
5x - 15
-3y + 25
13
10
A
73
57
J
C
X=13
AND
Y=4
Question #7
 Is the congruence statement true? Explain.
A B C  R ST
C
T
R
A
B
S
NO!
Triangle RST does not
match….ORDER of designated
angles MATTERS!
Triangle ABC is congruent to triangle
STR.
Question #8
 Is the congruence statement true? Explain.
SIX  R X I
I
S
R
X
Side IX is congruent in both
triangles by the Reflexive POC.
The triangles are congruent by
SSS congruence postulate.
Question #9
 Use the coordinates to determine if
 A (1,1), B (2,0), C (1,-1)
 D (3,1), E (4,0), F (3, -1)
ABC  DEF
AB 
2
BC 
2
CA  2
DE 
2
EF 
2
FD  2
YES!