Jillian and Tammy are considering a quadrilateral ABCD. Their task is to prove it is a square. Which method of proof is valid? Only Jillian's is valid, Only Tammy's is valid, Both are valid, Neither is valid

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

source:

you have orange juice on wednesday. (idk why this is the answer)

step-by-step explanation: