Answer:
7.7 cm
Step-by-step explanation:
You need to use trig ratios
this one needs the sin as we been to find the opposite side with the hypontenuse
9 x sin(45) = PQ = 7.65813172081
PQ = 7.7
9 sqrt(2) /2 = PQ
Since this is a right triangle, we can use trig functions
sin theta = opp/ hypotenuse
sin 45 = PQ = 9
9 sin 45 = PQ
???
C
