How can you use the side lengths of a triangle to determine if it is an acute triangle?

What value of x will make the triangles similar by the sss similarity theorem?

Anyone know? will mark brainliest if correct!

Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.