STATEMENT
REASON
1. m
3
= m 2 4
2, 22, 23 are supplementary
sides in
rays
3. m2 2 +m2 3 = 180°
3.
Definition of
agles
m2 2 + m 2 4 = 180°
4.
Substitution
5. m Z1 =m24
5. Opposite
are
6. m2 2 + m 2 1 = 180*
7. 21.2 2 are supplementary
7
Definition of
angles