$\"\"$

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Observe the figure:

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In $\"\"$ ,the angles are $\"\"$ .

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$\"\"$ (Sum of the three angles is $\"\"$ )

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$\"\"$ (Substitute $\"\"$ )

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$\"\"$ (Subtract $\"\"$ from each side)

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$\"\"$ (Commutative property: $\"\"$ )

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$\"\"$ (Additive inverse property: $\"\"$ )

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$\"\"$ (Additive identity property: $\"\"$ )

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$\"\"$ (Subtract: $\"\"$ )

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$\"\"$

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The $\"\"$ are angle bisectors.

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So, $\"\"$ and $\"\"$ .

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In $\"\"$ : $\"\"$ .

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$\"\"$ (Add: $\"\"$ )

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$\"\"$ (Substitute $\"\"$ )

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$\"\"$ (Divide: $\"\"$ )

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$\"\"$ (Subtract $\"\"$ from each side)

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$\"\"$ (Additive inverse property: $\"\"$ )

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$\"\"$ (Additive identity property: $\"\"$ )

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$\"\"$ (Subtract: $\"\"$ )

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$\"\"$

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Option G is right choice.