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2 years ago

Help thanks//////////??????????

Mathematics

2 answers:

3241004551 [841]2 years ago

8 0

Answer:

Step-by-step explanation:

At the point where two line cut across, the vertically opposite angles formed are equal. This means that

2x degrees = 78 degrees

Dividing the left hand side and the right hand side of the equation by 2, it becomes

2x/2 = 78/2

x = 39

Checking,

The sum of the angles on a straight line is 180 degrees.

180 - 78 = 102 degrees

2x + 102 = 180

2x = 180 - 102 = 78

x = 78/2 = 39

Ostrovityanka [42]2 years ago

4 0

Answer:

x = 39

Step-by-step explanation:

2x = 78

x = 78/2

x = 39

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