When we doubled the dimensions of Carlos the Scale Factor is 2. When we find the area you use the scale factor twice because there is a length and width making the area four times bigger. If the scale factor is three the perimeter would be multiplied by three. If you have a scale factor of 3 your area will be multiplied by 9 times as much because there is a length and width.

 

What I learned from Pythagorean Theorem is the small side and medium side that is mainly referred to as side a and b  are squared and then added together which equals to the square of side c. This formula only works on right triangles.