The scale factor from the large triangle to the small triangle is 3:1 What is the length of side x of the smaller triangle?

Step-by-step explanation:
Since the scale factor of the large to small triangle is 3 : 1, the side lengths of the small triangle are 1/3 of the big triangle side lengths. (such as 8 compared to 24)
Therefore 3x = 30 and x = 10.