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avatar+240 

  

 Apr 12, 2018
 #1
avatar+100595 
+3

The scale factor  of the larger triangle to the smaller  =  6/4  =  3/2

 

The  area of the larger triangle  =

 

(Area of smaller triangle )  *  (scale factor)^2  =

 

20    *  (3/2)^2  =

 

20  * 9/4  =

 

(20/4) * 9  =

 

5 * 9   =

 

45 cm^2

 

 

cool cool cool

 Apr 12, 2018
 #2
avatar+429 
+3

6cm/4cm=1.5

1.5²=2.25

20cm²*2.25=45cm²

 Apr 12, 2018

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