In an acute-angled triangle ABC, the altitudes from A, B, C when extended intersect the circumcircle again
at points A1, B1, C1, respectively. If angle ABC = 45° then angle A1B1C1 equals
In an acute-angled triangle ABC, the altitudes from A, B, C when extended intersect the circumcircle again
at points A1, B1, C1, respectively. If angle ABC = 45° then angle A1B1C1 equals
at points A1, B1, C1, respectively. If angle ABC = 45° then angle A1B1C1 equals
