Square on a (short leg)
9
sq units
Square on b (other leg)
16
sq units
Square on c (hypotenuse)
25
sq units
a² + b² =
9
+
16
=
25
= c²
✓ they match
▦ Fill the squares with units
↺ Reset
Drag the
brass dot
and the
mustard dot
to change the two legs. A square sits on every side. Watch it: the two smaller squares (
a²
+
b²
)
always
add up to the big square on the longest side (
c²
). That is Pythagoras' theorem.