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MArishka [77]
3 years ago
5

Can someone help me with all this?? i really dont get it ​

Mathematics
1 answer:
olga nikolaevna [1]3 years ago
8 0

Answer:

A=78

B=102

C=78

Step-by-step explanation:

A= a and 102 are on a straight line so they add up to 180. 180-102=78. The same goes for C

B= the vertical angle for 102, or the same thing with a and c, just flipped around

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MArishka [77]
A=3/6+4/6
B=somthing I can’t read them
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3 years ago
What must be true for lines a and b to be parallel lines? Select four options.
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The question is missing figure and the options. So, the figure is attached alongwith the options

Answer:

Correct options: (1), (2) , (7) and (8)

Step-by-step explanation:

Given:

Lines a and b are parallel.

Consider a║b  and 'd' be a transversal  then,

Statements                                    Reasons

1. ∠BXZ = ∠AZP = 58°                Corresponding angles are equal

∴ m∠2 = 58°

2. ∠BYC = ∠XYZ = (4x-10)° Vertically opposite angles are equal

Now, consider a║b and 'c' be a transversal then,

Statements                             Reasons

1. ∠XYZ = ∠QZU = (4x-10)°  Corresponding angles are equal

∴ m∠1 =  (4x-10)°

2.∠PZA + ∠PZQ + ∠QZU = 180° Sum of angles on a straight line is 180°.

3. 58\° +(3x-1)\°+(4x-10)\° = 180\°      Substitution property

4. 47\° + 7x= 180\°                   Combining like terms

5. 7x=180\°-47\°                         Subtraction property of equality

   ∴ 7x = 133\°

6. x = 19\°                                 Division property of equality

Plug in x = 19\ in\ (3x-1)\°\ and\ (4x-10)\°, we get

(3x-1)\° = (3(19)-1)\° = 56°

(4x-10)\° = (4(19)-10)\° = 66°

So, (3x-1)\° \ne (4x-10)\°

Hence, options (1), (2) , (7) and (8) are correct.

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Answer:

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---

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--------

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Step-by-step explanation:

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