Detailed description
Cartesian plane shown with two triangles ABC and \(A^\prime B^\prime C^\prime\) and a point D. Lines joining A to D and then D to \(A^\prime\), B to D and then D to \(B^\prime\) and from C to D and then from D to \(C^\prime\).
Triangle \(A^\prime B^\prime C^\prime\) is the image of triangle ABC under a rotation of 90 ° in an anticlockwise direction.
Coordinates:
D(2, 2); A(–3, 3); B(–1, 0); C(1, 2)
