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drek231 [11]
3 years ago
7

Potencias notables URGENTE!!!!!!!!!!!

Mathematics
1 answer:
Morgarella [4.7K]3 years ago
4 0
You never put in what the question was.
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Given: mAngleEDF = 120°; mAngleADB = (3x)°; mAngleBDC = (2x)° Prove: x = 24 3 lines are shown. A line with points E, D, C inters
N76 [4]

Answer:

" Vertical angles are congruent " ⇒ 2nd answer

Step-by-step explanation:

* <em>Look to the attached figure </em>

- There are three lines intersected at point D

- We need to find the missing in step 3

∵ Line FA intersects line EC at point D

- The angles formed when two lines cross each other are called

 vertical angles

- Vertical angles are congruent (vertical angles theorem)

∴ ∠ADC and ∠FDE are vertical angles

∵ Vertical angles are congruent

∴ ∠EDF ≅ ∠ADC

∴ m∠EDF ≅ m∠ADC

∵ m∠EDF = 120° ⇒ given

∵ m∠ADC = m∠ADB + m∠BDC

∴ m∠ADB + m∠BDC = 120°

∵ m∠ADB = (3x)° ⇒ given

∵ m∠BDC = (2x)° ⇒ given

∴ 3x + 2x = 120 ⇒ add like terms

∴ 5x = 120 ⇒ divide both sides by 5

∴ x = 24

Column (1)                                                     Column (2)

m∠EDF = 120°                                               given

m∠ADB = 3 x                                                 given

m∠BDC = 2 x                                                 given

∠EDF and ∠ADC are vertical angles           defin. of vert. ∠s

∠EDF is congruent to ∠ADC                        vertical angles are      

                                                                        congruent  

m∠ADC = m∠ADB + m∠BDC                        angle add. post.

m∠EDF = m∠ADC                                          defin. of cong.

m∠EDF = m∠ADB + m∠BDC                         substitution

120° = 3 x + 2 x                                               substitution

120 = 5 x                                                         addition

x = 24                                                              division  

∴ The missing reason is " vertical angles are congruent "

- From the explanation above ∠ADC and ∠FDE are vertical

 angles then they are congruent according to vertical angle

 theorem

6 0
3 years ago
Read 2 more answers
What is equivalent too 48j +36
Nata [24]
84j is the equivalent.
Just add 36 to 48 and put the j on.
7 0
2 years ago
What's 8.23+10.9 simplified
ladessa [460]
8.23+10.9= 19.13

~Hope this helped!~

6 0
3 years ago
By which rule are these triangles congruent?
GrogVix [38]

Answer:

sss

Step-by-step explanation:

3 0
2 years ago
2(8-12x)+8x=-25x+52 <br> show your work pls <br> I am so confused on this.
Allisa [31]

Answer:

x=4

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

Step 2: Add 25x to both sides.

Step 3: Subtract 16 from both sides.

Step 4: Divide both sides by 9.

8 0
3 years ago
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