Two triangles are similar, and the ratio of each pair of corresponding sides is 7:3. What is the ratio of the perimeters? What is the ratio of the areas?

Answer 1

since perimeter is a linear measurement the ratio would be 7:3 , but
the ratio of their areas is 7^2 : 3^2 = 49 : 9

Answer 2

49:90

Answer 3

81:256