Answer:

- We're provided - ∠AGB = 30° , ∠ DGC = 50° and ∠ EGF = 2x. We're asked to find out m ∠ EGF.
- Note that ∠ AGB , ∠ BGC and ∠ DGC form a straight line which means that their sum is equal to 180°.
- When two lines intersect , the angles formed opposite to each other are called verticall opposite angles. Vertically opposite angle are always equal to each other.

- Re-read the second point which I have mentioned above. Now , Set up an equation and solve for ∠ BGC .
[ Sum of angle in a straight line ]




- Hence , m ∠ BGC = 100°. Now , Re-read the third point which I have mentioned above and set up an equation and solve for x.
[ being vertically opposite angles ]


- The value of x is 50°. Now :



- Hence , Our final answer is 100° . And we're done!

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