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avatar+2448 

The polygons in each pair are similar

 Mar 19, 2018
 #1
avatar+100456 
+2

13...Correct  !!!

 

14.   

 

(x  + 2 ) / 15  =  8 /10      

(x + 2) / 15  =  4/5    cross-multiply

5(x + 2)  = 15 * 4

5x + 10  =  60

5x  =  50

x  =  10

 

15.  This one is a little tougher  !!

 

9 /15   = [2x - 6] / 20       simplify 

3/5  =  2[x - 3] / 20

3/5 = [x - 3]  / 10     cross-multiply

30  = 5[ x - 3]

6  = x - 3

9  = x 

 

 

cool cool cool

 Mar 19, 2018

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