The ratio of the areas of two similar polygons is 225:25. What is the ratio of their corresponding sides?

2:1

3:1

5:1

9:1

Question

The ratio of the areas of two similar polygons is 225:25. What is the ratio of their corresponding sides?

 2:1

 3:1

 5:1

 9:1

anonymous · Answer

LOL that is not you in that picture

nurali · Answer

Ratio of areas = a^2: b^2
Ratio of sides = a:b

In this case...
Ratio of areas = (15)^2: (5)^2
Ratio of sides = 15:5
Ratio of sides = 3:1

anonymous · Answer

Ok, I thought 3:1 as well, I will let you know..

anonymous · Answer

Can you help me with one more tough question?

anonymous · Answer

Two regular pentagons have areas of 20 mm² and x² - x mm². What values of x make the pentagons congruent?

 4 and 5

 4 and -5

 -4 and 5

 -4 and -5