Identify the reason that justifies the following statements. 19) 1=~4
20) 2+4+5 = 180
21) 5+7=180
22) 4+2=7
23) If CA bisects DCB, then 1 =~ 2
24) 3+7=180

Possible reasons:

A. Triangle exterior angle theorem
B. Vertical angles are congruent
C. Angle addition postulate
D. If lines are parallel, then alternate interior angles are congruent
E. If lines are parallel, then corresponding angles are congruent
F. If lines are parallel, then same side interior angles are supplementary
G. Definition of midpoint
H. Definition of angle bisector
I. The sum of the angles of a triangle is 180

The avenues in a particular city run north to south and are numbered consecutively with 1st avenue at the western border of the city. the streets in the city run east to west and are numbered consecutively with 1st street at the southern border of the city. for a festival, the city is not allowing cars to park in a rectangular region bordered by 5th avenue to the west. 9th avenue to the east, 4th street to the south, and 6th street to the north. if x is the avenue number and yis the street number, which of the following systems describes the region in which cars are not allowed to park? 5th ave 9th ave