Question

ellusRotate the triangle 270° counterclockwisearound the origin and enter the newcoordinates.Enter thenumber thatbelongs in thegreen boxA (31.0 A(1,-1)B(4,-2)C II )BC.0D 2.-4)

Answer 1

A rotation of 270° counterclockwise is given by the following rule:

`(x,y)\rightarrow(y,-x)`

Apply that rule to the coordinates of A, B, and C to find the coordinates of A''', B''', and C'''.

`\begin{gathered} A(1,-1)\rightarrow A^(\prime\prime\prime)(-1,-1) \\ B(4,-2)\rightarrow B^(\prime\prime\prime)(-2,-4) \\ C(2,-4)\rightarrow C^(\prime\prime\prime)(-4,-2) \end{gathered}`