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musiclover10045

The total of the inside angles for a 6 sides shape is 720 degrees.

Find the total of the known angles and subtract the from 720:


130 + 120 + 145 + 160 + 65 = 620


X = 720 - 620

X = 100
The interior angle sum is (n-2) *180
where n= number of sides

The current angles add up to 620 therefore x must be 100 to make the angle sum 720.