The figure shown is often used to prove the Pythagorean theorem. Part of the proof is
showing that QRST is a square. The four sides of QRST are the same length. Which
explanation best completes the proof that QRST is a square?

The figure shown is often used to prove the Pythagorean theorem Part of the proof is showing that QRST is a square The four sides of QRST are the same length Wh class=