2. which of the following equations are true? select all that apply.
a.
m∠3+m∠5=m∠4
b.
m∠3+m∠2=m∠5
c.
m∠3+m∠2=m∠1
d.
m∠3+m∠4+m∠2=180°
e.
180°−m∠1=m∠2

d. vertex

step-by-step explanation:

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statement #3: proof- ang is congruent to ang ecd : angles are congruent.  

step-by-step explanation:

1: the missing angles in statement #3  

a.) acb  

reason- the reason why the answer is acb is because angle ecd and angle acb are both the same size *that's what the word congruent means this is really simple.  

2: the missing word in reason #3  

c.) vertical  

reason- the reason why the answer is vertical is because the angles in that diagram on figure 2 is slanted, which is vertical, and the e and a both lay on vertical lines. along with the other's, but e and a are the 2 main points you want to focus on. and c is kind of like your starting point, because c is for both angles, not just one.  

i hope that was and understanding.

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step-by-step explanation: