Question

ΔDEF rotates 90° clockwise about point A to create ΔD 'E 'F. Therefore, which equation must be true?

1.)m∠DEF = m∠D 'F 'E '
2.)m∠D 'E 'A ' = m∠DAE
3.)m∠EAE ' = m∠FAF '
4.)m∠DAE m∠E 'AF '