+0  
 
0
102
1
avatar

The areas of two similar figures are 20 cm2 and 45 cm2. What is the scale factor of their corresponding sides? What is the ratio of their perimeters?

Guest Apr 18, 2017
Sort: 

1+0 Answers

 #1
avatar+75352 
+2

The scale factor ratio is just the square root of the area ratio...so

 

sqrt  (45/ 20)  = sqrt ( 9 * 5) / sqrt(4 *5)  = sqrt (9/4)   = 3/2  =  3 : 2

 

Since perimeter is a linear measure, the perimeter ratio is the same   3 : 2

 

 

cool cool cool

CPhill  Apr 18, 2017

4 Online Users

avatar
avatar
We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details