4.2 Review Worksheet
4.2.1 Triangle Congruence: SSS and SAS Use SSS to explain why the triangles in each pair are congruent. 1. △ BCD ≅ △ EDC B C 4 in. 2. △ GJK ≅ △ GJL G
3 in.
3 in.
K
L
J
D
E
4 in.
3. The lights shining on a stage appear to form two congruent right triangles. Given EC ≅ DB , use SAS to explain why △ ECB ≅ △ DBC .
E
D
C
B
Show that the triangles are congruent for the given value of the variable. 4. △ MNP ≅ △ QNP , y = 3 M ( 10 y 2 ) ° 5. △ XYZ ≅ △ STU , t = 5 X
S
t 2 – 3
U
3
4
20
22
4 t
N
P
24
Y
Z
y 2 – 6
y + 1
5 t – 1
T
Q
247
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