Question

Angle PQR is formed by segments PQ and QR on the following coordinate grid:

Answer 1

Angle PQR is rotated 90 degrees counterclockwise about the origin to form angle P′Q′R′. Which statement shows the measure of angle P′Q′R′?

Answer 2

the options are
m∠P′Q′R′ = 90 degrees
m∠P′Q′R′ = 180 degrees
m∠P′Q′R′ = m∠PQR
m∠P′Q′R′ = 2 ⋅ m∠PQR

Answer 3

i think it is the first one