Question

In Fig. 8.38, AOC is a line, find x.

Answer 1

Answer:

55°

Step-by-step explanation:

2x+70°=180(Linear Pair). 2x=110. ,x=55°

Answer 2

Given :  AOC is a line.

To find : The value of x.

From the figure it is given that :  

∠AOB = 70° and ∠BOC = 2x°

∠AOB and ∠BOC form linear pairs.

∠AOB + ∠BOC = 180°

70° + 2x° = 180°

2x° = 180° – 70°

2x° = 110°

x = 110°/2

x = 55°

Hence, the value of x is 55°.

Extra information :  

Every angle has a measure.  The unit of angle measure is a standard angle, called a 'degree'(°).

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