Anja is creating a triangle using three straws. The two shorter straws have lengths of 20 cm and 21 cm. How long, in centimeters, should the third straw be for Anja to create a right triangle?
A diagonal of a cube measures 30 inches. The diagonal of a face measures StartRoot 600 EndRoot inches.

In inches, what is the length of an edge of the cube? Round the answer to the nearest tenth.

inches