TOT 133 1987 Spring Train J2 trangle of feet of altitudes. parallel sides
Source:
April 17, 2020
geometryaltitudeparallel
Problem Statement
In an acute angled triangle the feet of the altitudes are joined to form a new triangle. In this new triangle it is known that two sides are parallel to sides of the original triangle . Prove that the third side is also parallel to one of the sides of the original triangle .