12 points! ! 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′? a m∠p′q′r′ = 90 degrees b m∠p′q′r′ = 180 degrees c m∠p′q′r′ = m∠pqr d m∠p′q′r′ = 2 ⋅ m∠pqr