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avatar+122 

https://prnt.sc/hmnt99

 

https://prnt.sc/hmntce

 

https://prnt.sc/hmntpm

 Dec 12, 2017
 #1
avatar+101746 
+2

Here's the first

 

HS / HK  =  DY / DL

 

32 / 15  = DY   /  24       multiply both sides by 24

 

24 * 32  / 15   = DY

 

(8/5)*32   = DY  =  51.2

 

 

cool cool cool

 Dec 12, 2017
 #2
avatar+101746 
+1

Here's the second

 

We can find the scale factor thusly :

 

JK / EF  =  11.2 / 28   =    2/5  =  .4

 

 

 

cool cool cool

 Dec 12, 2017
 #3
avatar+101746 
+1

For the third....it's lengthy....I am going to show you how to find one vertex in the new figure.....I'll let you find the other three....if you get stuck...let me know

 

Let's call one vertex in the "before" figure -  (-4,3)  -     A

 

Here's the formula  to get A'

 

New vertex  =   [  vertex point -  dilation center ] * scale factor  +   dilation center

 

So we have 

 

A '  =   [ (-4, 3)  - (7 , - 2)  ]  * 2  +   ( -7, - 2)

 

A'  =  [ (-11, 5 ) ] *2   +  ( -7, -2)

 

A'  =  (-22, 10)  + ( -7, -2)

 

A'  =  (-29, 8)

 

Now...just apply the same procedure separately to the other 3 vertices of the "before" figure  to find the  "after" points

 

 

cool cool cool

 Dec 12, 2017
 #4
avatar+122 
+1

Thanks!

Severoth  Dec 12, 2017

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