Question

STUVWXYZ is a rectangular cuboid. Find SU.

Answer 1

In $\Delta SUT$

$\Rightarrow S{U}^2=U{T}^2+S{T}^2$

$\Rightarrow S{U}^2={15}^2+{11}^2$

$\Rightarrow S{U}^2=225+\left(2\right)=346$

$\Rightarrow SU=18.6$cm.