Question

TriangleABC is transformed to form  triangleA'B'C' .

Answer 1

A=(2,4); B=(3,9); C=(4,1)
A'=(4,-2); B'=(9,-3); C'=(1,-4)

All the points P=(x,y) change to P'=(y,-x), this corresponds to a rotation counterclockwise about the origin, then:

Answer: Triangle ABC is
First box: rotated counterclockwise
Second box: 90° about the origin
to form triangle A'B'C'

Answer 2

Answer:

Triangle ABC is rotated counterclockwise 270° about the origin

Step-by-step explanation:

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