Question

riangle ABC is rotated clockwise to create triangle A’B’C’. What is the angle of rotation?

On a coordinate plane, triangle A B C has points (negative 2, negative 2), (negative 2, negative 4), (negative 3, negative 2). Triangle A prime B prime C prime has points (negative 2, 2), (negative 4, 2), (negative 2, 3).

Answer 1

The rotation is 90° clockwise.

Reason: a 90° clockwise rotation about the origin sends (x,y) to (y,−x).
Apply to each vertex:
- A(−2,−2) → (−2,2) = A'
- B(−2,−4) → (−4,2) = B'
- C(−3,−2) → (−2,3) = C'

So the triangle was rotated 90° clockwise.