The interior angles of a simple (and planar) quadrilateral ABCD add up to 360 degrees of arc, that is. This is a special case of the n-gon interior angle sum formula (n â 2) Ã 180Â°. All convex quadrilaterals tile the plane by repeated rotation around the midpoints of their edges.
1 CostHelper readers report paying $150-$300 for a windshield replacement, at an average cost of $214. 2  WindshieldsToGo.com provides an online form to estimate the cost of windshield replacement with and without installation, based on zip code and the year, make, model and style of vehicle.
How Much Does a Car Window Cost? Typical costs: A front windshield typically costs $10-$150 to repair a chip or crack, and $100-$400 for a replacement, although it can cost $500-$1,500 for a rare windshield. The repair or replacement can be done in a shop or by a mobile service (mobile service typically costs slightly more).