the perimeters of 2 similar polygons are 20 and 28. One side of the smaller polygons is 4. What is the congruent side of the larger polygon?

Answer 1

This is quite simple.
Use ratios to get 20:28
(smaller polygon:larger polygon)
Which equals 4:7.
This means that any side lengths of the smaller polygon to the ratio of its congruent side lengths of the larger polygon equals 4:7.
The work is cut out for you, as we know that one side is 4, therefore the other is 7.

Answer 2

it doesn't solve anything at all... so,it not useful to me..

Answer 3

umm...thanks.