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?

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft

c

step-by-step explanation: easy math

  or  

sin y = 7/q

7 is the opposite side length, q is the hypotenuse

tan y = 7/r

7 is the opposite side length, r is the adjacent side length

using sohcahtoa ^^^^

cos y = adjacent/hypotenuse

cos y = r/q

a. positive: 2 or 0; negative : 2 or 0; complex: 4or2or0