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Mathematics
Mathematics
Problem
In
△
A
B
C
\triangle ABC
△
A
B
C
,
A
B
=
A
C
AB = AC
A
B
=
A
C
. Side
B
C
BC
B
C
is produced to point
D
D
D
. If
∠
A
C
D
=
115
∘
\angle ACD = 115^{\circ}
∠
A
C
D
=
11
5
∘
and
∠
C
A
B
=
(
2
x
−
5
)
∘
\angle CAB = (2x - 5)^{\circ}
∠
C
A
B
=
(
2
x
−
5
)
∘
, find (i)
x
x
x
and (ii)
∠
A
B
C
\angle ABC
∠
A
B
C
. a. (i) Value of
x
x
x
b. (ii) Measure of
∠
A
B
C
\angle ABC
∠
A
B
C
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