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?

Respuesta :

Answer:

Angles 1,2,3, form a stright line

Step-by-step explanation:

i took the test

Answer: 1,2,and 3 from a straight angle

Step-by-step explanation: