we know that
[area of larger triangle]=[scale factor]²*[area of smaller triangle]
[scale factor]=√[area of larger triangle/area of smaller triangle]
[scale factor]=√[49/16]-----> 7/4
Part A) what is the ratio of the corresponding side lengths?
the ratio of the corresponding side lengths is equals to the scale factor
the answer Part A) is
the ratio of the corresponding side lengths is 7/4
part B)what is the ratio of the perimeters?
the ratio of the perimeters is equals to the scale factor
the answer Part B) is
the ratio of the perimeters is 7/4