Prove:
21, 22 are supplementary
4
STATEMENT
1. m 23 m 2 4
2. Z2, Z3 are supplementary
3. m2 2+m3= 180°
4. m 22+ m2 4 = 180°
5. m 1 m 24
6. m2 + m Z1 = 180°
7.2 1,22 are supplementary
REASON
1.
2.
3. Definition of
4. Substitution
5. Opposite
6.
7. Definition of
sides in
angles
are
angles
rays