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Mathematics
Mathematics
Problem
In triangle
X
Y
Z
XYZ
X
Y
Z
,
∠
X
=
∠
Y
\angle X = \angle Y
∠
X
=
∠
Y
. If the side opposite
∠
X
\angle X
∠
X
is
(
3
a
−
5
)
cm
(3a - 5)\,\text{cm}
(
3
a
−
5
)
cm
and the side opposite
∠
Y
\angle Y
∠
Y
is
(
2
a
+
7
)
cm
(2a + 7)\,\text{cm}
(
2
a
+
7
)
cm
, find
a
a
a
. a)
2
2
2
b)
6
6
6
c)
12
12
12
d)
5
5
5
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