# Simple enlargements in a triangle

• Jul 24th 2012, 04:48 AM
terone71
Simple enlargements in a triangle

Enlarge triangle P with the scale factor of 3 and centre (3,4) What are the new co-ordinates of the new triangle if the point of the triangle P are (4,6),(5,6) and (4,8)

I'm new to this topic and need help!!!
• Jul 24th 2012, 07:43 AM
earboth
Re: Simple enlargements in a triangle
Quote:

Originally Posted by terone71

Enlarge triangle P with the scale factor of 3 and centre (3,4) What are the new co-ordinates of the new triangle if the point of the triangle P are (4,6),(5,6) and (4,8)

I'm new to this topic and need help!!!

1. I've labeled the vertices of the triangle with P, Q and R. The center is C.

2. You "go" from C to P 1 step right and 2 steps up. To reach P' you have to "go" from C 1 * 3 steps right and 2 * 3 steps up. You'll end at P'(6, 10)

3. Do the other 2 vertices similarly.

4. Since you are horrible at math as you've stated several times I didn't use vectors which would be the simpliest way to do your question.
• Jul 24th 2012, 08:25 AM
terone71
Re: Simple enlargements in a triangle
Thanks so much! I was in big trouble in maths!