Help please, am i right?

Yes you are right. Line AB is perpendicular to CD.

Explanation:

The first line AB has a slope of 0, meaning it is horizontal. The second line CD has an undefined slope, since it is a vertical line.

yes

Step-by-step explanation:

answer: the answer is 23

step-by-step explanation:

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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