Question

Rotate the triangle 180° counterclockwisearound the origin and enter the newcoordinatesCOULDEnter thenumber thatbelongs in the

Answer 1

A rotation of 180° counterclockwise is given by the rule:

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

Then, since the coordinates of A are (1,-1), we can find the coordinates of A' by applying the rule.

$A(1,-1)\rightarrow A^{\prime}(-1,1)$

Since the box corresponds to the first coordinate of A', then:

$?=-1$