Question

Geometry: Scale Factors (Enlargement)

Haley drew a triangle JKL with the points:
J(-3, 0)
K(-2, 2)
L(0, 0)

What will be the new points of triangle MNL using a scale factor of 3 and the origin as the center?

Answer 1

@skullpatrol @KamiBug @mathstudent55 @AbdullahM

Answer 2

Do I just multiply each of the coordinates by 3?

Answer 3

We need to multiply by the scale factor which is 3.

J(-3,0) * 3 --> J'(x,y)
K(-2,2) * 3 --> K'(a,b)
L(0,0) * 3 --> L'(0,0)

-3 * 3 = x
0 * 3 = y

-2 * 3 = a
-2 * 2 = b

Answer 4

Basically, yes!

Answer 5

What about the center being the origin? Do we need to do anything about that?

Answer 6

Nope, 0 * 3 = 0

and so the center remains the center.

Answer 7

OK. Thank you.

Answer 8

actually the center changes too

Answer 9

draw the picture to understand it

Answer 10

I don't understand.

Answer 11

I don't think so.

Answer 12

this is your starting triangle

Answer 13

where is the center of that triangle?

Answer 14

By the center do you mean the origin?

Answer 15

no the centroid

Answer 16

the problem is telling the center as well not just scaling the the lengths