In a right-angled triangle with hypotenuse $c$ and medians $d, e, f$, —

• a$d^2 + e^2 + f^2 = c^2$
• b$2(d^2 + e^2 + f^2) = 3 c^2$
• c$3(d^2 + e^2 + f^2) = 2 c^2$
• d$d^2 + e^2 + f^2 = 3 c^2$