Question

On a coordinate plane, triangle B C D has points (negative 4, 1), (negative 2, 1), (negative 4, 3). Triangle B prime C prime D prime has points (negative 1, negative 4), (negative 1, negative 2), (negative 3, negative 4). Triangle BCD is rotated counterclockwise to form triangle B’C’D’. What is the angle of rotation? 45° 90° 180° 360°

Answer 1

90 degrees

Explanation:

Answer 2

9514 1404 393

Answer:

90° CCW

Explanation:

The transformation from B to B' is ...

B(-4, 1) ⇒ B'(-1, -4)

(x, y) ⇒ (-y, x) . . . . . matches the transformation for 90° CCW