22-07-2016
Mathematics

contestada

If a circle is enlarged so that it has a new area that is 25 times the original, what factor were the dimensions changed by?

5
25
625
1/5

Respuesta :

06-10-2018

The original radius was made 5 times larger.

Answer Link

26-03-2019

Answer:

The dimensions were changed by 5.

Step-by-step explanation:

Let the area of original circle be [tex]x^{2}[/tex]

So area of enlarged circle is [tex]25x^{2}[/tex]

The ratio of area for the original and enlarged circle is 1:25

The ratio of area is the sqauare of the scale factor.

So the scale factor is 1:5

The dimensions were changed by 5 .

Answer Link

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