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Mathematics
Mathematics
Problem
Let
△
A
B
C
\triangle ABC
△
A
B
C
be a given triangle. If
∣
B
A
−
t
B
C
∣
≥
∣
A
C
∣
|\mathbf{BA} - t\mathbf{BC}| \ge |\mathbf{AC}|
∣
BA
−
t
BC
∣
≥
∣
AC
∣
for any
t
∈
R
t \in \mathbb{R}
t
∈
R
, then
△
A
B
C
\triangle ABC
△
A
B
C
is a. Equilateral b. Right angled c. Isosceles d. None of these
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