The corresponding length of the side in the first triangle is 4.5 m.
This would be
Area of small triangle / area of larger triangle = k²
k²= 75/300
= 0.25
Hence k = 0.5
Then the length of the corresponding side would be
9m x 0.5
Length = 4m
Read more on triangles here: https://brainly.com/question/12238666
#SPJ1