[i]VA[/i], [i]VB[/i] and [i]VC[/i] are perpendicular to each other.[br]Project vertex [i]V[/i] onto the base[br]What is the relationship between the projection [i]V[/i]' and triangle [i]ABC[/i]?
Reference:[br]https://www.hkame.org.hk/uploaded_files/magazine/43/601.pdf