a b c

Drag the blue dot to change a, the red dot to change b. The hypotenuse c follows.

a
= —
b
= —
c
= —
K·c² K·a² K·b² c a b
together apart
small · hyp a
(a/c)² of big = —
area = —
medium · hyp b
(b/c)² of big = —
area = —
big · hyp c
100% of itself
area = —