NEED THIS ASAP 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

1,918

step-by-step explanation:

the answer is:

mean: 6

mad: 2.14

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.