Let: hypotenuse = a , known leg = b , unknown leg = c
According to Pythagoras' Theorem: [tex]a^{2} = b^{2} + c^{2} [/tex]
[tex] c^{2} = a^{2} - b^{2} [/tex]
[tex] c^{2} = (32 inches)^{2} - (18 inches)^{2} [/tex]
c = [tex] \sqrt{(32 inches)^{2} - (18 inches)^{2}}[/tex]
c = 3.74 inches
∴ the length of the hypotenuse to 1d.p. ≈ 3.74 inches
