PLEASE HELP ME ANSWER THIS CORRECTLY! THIS IS MY 1st PART OF EXAM! PLEASE PLEASE PLEASEE!

A plus B equals D

Step-by-step explanation:

Because if you add the angles of A and B together, it will always equal D, or the third corner, because if it didn't it wouldn't be a triangle. Sorry, isn't the best explanation but that's all I've got lol.

As triangle "angles" that add up to 180, I will use the angle as an example, if ∠a is 80° and ∠b is 40°. ∠80 + ∠40 = ∠120.

For a triangle, the total angle is 180° and ∠c would be 60°. The same goes to supplementary which is 180° striaght line, if ∠c is 60° then ∠d is 120°. In conclusion as of my explanation, ∠a + ∠b = ∠d is that triangle and supplementary have the same total angle of 180°.

ege

step-by-step explanation:

egge

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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