$\"\"$ \ \

The measures of two angles of a triangle are $\"\"$ and $\"\"$ .

Find the third angle of triangle. \ \

The sum of the interior angles of a triangle is $\"\"$ .

Hence, $\"\"$ .

Substitute two angles of a triangle are $\"\"$ and $\"\"$ .

$\"\"$ .

Subtract $\"\"$ and $\"\"$ from each side. \ \

Therefore, the third angle of triangle is $\"\"$ .

$\"\"$ \ \

Option G is right choice. \ \