Since a quadrilateral can mean any 4-sided shape there is no true definition of their angles. A square is always a quadrilateral and therefore it's angles will always equal 90 degrees. 6-2(180)=360 360/4= 90
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it's 90 degrees
360
It is 90 degrees or pi/2 radians.
A chevron (arrowhead) is a quadrilateral with one angle of more than 1800.
The sum of all four interior angles in a quadrilateral must be 360, so the answer would be: 360 - 54 - 25 - 99 = 182