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.
The cost of replacement depends on the type of windshield. Glass is priced depending on how hard it is to produce. The more the window is curved or shaped the higher the cost. You should check around for prices you may find a big difference in cost.bout two weeks ago a rock chips and crack my windshield about 2 inch, now the crack about 10 inches. do i need to replace it or can it be repaired?