Q: How do you know what scale factor to use?

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i really dont know

I really don't know.

New perimeter = old perimeter*scale factor New area = Old area*scale factor2

Tautologically!

If you know one of the sides of both the rectangles than you just divide them by one another to find the scale factor.

Related questions

Surveying and land use jobs which use a map to scale. Also construction jobs will use plans of the building which are drawn to scale with a stated scale factor.

The way you use a scale factor to enlarge a triangle is to multiply each side of the triangle by that scale factor. Your triangle will then be that many times larger.

i really dont know

a scale factor of 4.5 is your answer

I really don't know.

New perimeter = old perimeter*scale factor New area = Old area*scale factor2

multiplication

You increase the scale factor.

Tautologically!

The area scale factor is the square of the side length scale factor.

they are alike because i don't know

If you know one of the sides of both the rectangles than you just divide them by one another to find the scale factor.