(2x)
![subject](/tpl/images/cats/mat.png)
Mathematics, 23.10.2020 23:50 mairadua14
What is the missing reason in step 3?
Given: m ZEDF = 120°; m ZADB = (3x)"; m 2BDC =
(2x)
Prove: x = 24
Reasons
1. given
F
Statements
1. MZEDF=120°
mZADB = (3x)
m2BDC-(2x)
2. ZEDF and ZADC are vert Zs
3. ZEDF ZADC
4. MZADC = MZADB+mZBDC
5. MZEDF - MZADC
6. MZEDF- MZADB-m BDC
N7120-3x+2x
8. 120 - 5x
9. X-24
m
120°
D
(3x)
2. def. of vert. 25
3. ?
4. Zadd. post
5. def. of
6. Substitution
7. Substitution
8. addition
9. div. prop of eq
(2x)
с
B
А
vertical angles are congruent
O substitution
O definition of congruency
O definition of equality
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You know the right answer?
What is the missing reason in step 3?
Given: m ZEDF = 120°; m ZADB = (3x)"; m 2BDC =
(2x)
(2x)
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