PROVING A THEOREM Prove the Third Angles Theorem by using the Triangle Sum
A
B
STATEMENTS
D
E
ZA ZD, ZB ZE
m/A= m/D, m ZB = m/E
REASONS
Given

PROVING A THEOREM Prove the Third Angles Theorem by using the Triangle Sum A B STATEMENTS D E ZA ZD ZB ZE mA mD m ZB mE REASONS Given class=