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.
Heated windshields can cost up to $230.00 more to replace than a standard, non-heated windshield. Repairing these types of windshields is much more cost effective than replacement, and your customers will be ecstatic with the cost savings by choosing to have it repaired. Link to heated windshields.