If the perimeter of the triangle formed by the feet of the altitudes of is equal to…
MATHEMATICS · Single correct · A Level · Mathematics · Trigonometry · Trigonometry
Problem
If the perimeter of the triangle formed by the feet of the altitudes of △ABC is equal to four times the circumradius of △ABC, then △ABC is:
(1) Isosceles triangle
(2) Equilateral triangle
(3) Right-angled triangle
(4) None of these