Triangle abc was transformed using the rule (x, y) → (–y, x). the vertices of the triangles are shown.

a (–1, 1)
b (1, 1)
c (1, 4) a' (–1, –1)
b' (–1, 1)
c' (–4, 1)
which best describes the transformation?

the transformation was a 90° rotation about the origin.
the transformation was a 180° rotation about the origin.
the transformation was a 270° rotation about the origin.
the transformation was a 360° rotation about the origin

answer: i think it is (1,-2)

351°f

step-by-step explanation:

geometry: triangles

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call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584

answer: he is 272195

step-by-step explanation: all you have to do is multiple 3535 and 77 and it equals 272195