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Problem
Problem
If the perimeter of the triangle formed by foot of altitudes of the
Δ
A
B
C
\Delta ABC
Δ
A
B
C
is equal to four times the circumradius of
Δ
A
B
C
\Delta ABC
Δ
A
B
C
, then
Δ
A
B
C
\Delta ABC
Δ
A
B
C
is a. isosceles triangle b. equilateral triangle c. right angled triangle d. None of these
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