Isaac is trying to solve the problem below. the length of a rectangle is 7 inches greater than the width. the perimeter is 70 inches. what is the width of the rectangle? isaac solved an equation, and the solution was w = 14. he then made sure that a rectangle with width 14 inches and length 21 inches had a perimeter of 70 inches. which problem-solving step was this?

given that triangle abc is transformed two times to get triangle

a"b"c"

first abc is transformed in to a'b'c' as follows:

the coordinates of a are (1,-1) and transformed into a'(-1,1)

similarly b (4,-2) became b'(-4,2) and

c(7,-2) became c'(-7,2)

i.e. (x,y) becomes (-x,-y)

this is nothing but reflection about a point here origin.

thus first transformation is reflection on the origin.

next is exactly shifting 3 units down

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