+0

0
145
4
+80

https://prnt.sc/hmnt99

https://prnt.sc/hmntce

https://prnt.sc/hmntpm

Severoth  Dec 12, 2017
Sort:

#1
+83976
+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

CPhill  Dec 12, 2017
#2
+83976
+1

Here's the second

We can find the scale factor thusly :

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

CPhill  Dec 12, 2017
#3
+83976
+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

CPhill  Dec 12, 2017
#4
+80
+1

Thanks!

Severoth  Dec 12, 2017

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