Angle pqr is formed by segments pq and qr on the following coordinate grid: a coordinate grid is shown from positive 6 to negative 6 on the x-axis and from positive 6 to negative 6 on the y-axis. a line segment pq is shown with p as ordered pair negative 1, negative 1 and q as ordered pair negative 5, negative 4. another line segment qr is shown with r as ordered pair negative 1, negative 4. 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′? (1 point) 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