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.
Mazor says that a new windshield might be cheaper than you would think. In many cases, windshield repair is covered by car insurance (under your comprehensive coverage â not collision). The deductible for comprehensive coverage is sometimes only $50 or $100, so that would be the cost of a new windshield.