+0  
 
-1
757
1
avatar+1015 

The smaller triangle is the image of the larger triangle after a dilation. The center of the dilation is (−3,−2).

 

What is the scale factor used to create the dilation?

AngelRay  Nov 20, 2017
 #1
avatar+88980 
+1

Let C  =  (-3, -2)

Let A = ( 5, -2)

Let A' =  ( -5, - 2)

 

So we have that

 

< A'  > =   < A  - C > *(Scale Factor) + < C >

 

< -5, -2 >  =  <  8, 0 > *(Scale Factor) + < -3, -2 >

 

< -2, 0 >  =  < 8, 0 > * (Scale Factor )

 

So

 

-2  =  8 * Scale Factor     ....... divide both side by 8

 

- (1/4)  =  Scale Factor

 

 

cool cool cool

CPhill  Nov 21, 2017

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