Question

Octagon ABCDEFGH and its dilation, octagon A'B'C'D'E'F'G'H', are shown on the coordinate plane below:
If the center of dilation is at the origin, by what scale factor was octagon ABCDEFGH dilated?

Answer 1

Awnser choices are
A. 1/2
B. 2
C. 4
D. 1/4

Answer 2

@malcolmmcswain ????? can you help

Answer 3

@CompuTux Can you help?

Answer 4

@benlindquist Can you help?

Answer 5

Well, you should take an easy point in the dilated octagon and read the distance from the origin; Same for the non dilated octagon. The take the ratio of these two distance. :)

Answer 6

I thought it was 2 is that correct?

Answer 7

Yes it is !

Answer 8

Becuase there are two points in between

Answer 9

Thank you

Answer 10

But that's not a good argument.

Answer 11

If hexagon IJKLMN is dilated by a scale factor of two fifths from the origin to create hexagon I'J'K'L'M'N', what is the ordered pair of point N'?

Answer 12

This is very confusing

Answer 13

For your second question :

What is the coordinates of point N?

When you know these coordinates, you have to multiply the x-component and the y-component by 2/5 and this gives the result. :)

Answer 14

How would i do that?

Answer 15

The coordinates for n is (-6,2) so i multiply that by 2/5?

Answer 16

Yes :

The x-component of N' is -6*2/5=-12/5
The y-component of N' is 2*2/5=4/5

Try to figure it. :)

Answer 17

Thank you so much!

Answer 18

The polygons below are similar. Find the value of x