Quadrilateral

  **// Quadrilateral //**  is a 4-sided polygon 
 * __Definition__ **

__Properties__ ** //Angle Properties// ** ** ** 1. ** *All angles add up to 360 Angle AQU + Angle QUD + Angle UDA + Angle DAQ = 360 71.32 + 81.94 + 105.12 + 101.62 = 360
 * There are 4 angles

This is the most important property of a quadrilateral for the following reasons: - By knowing that all angles in a quadrilateral add up to 360, unknown angle measures can be easily solved @Kite, a type of quadrilateral has one pair of opposite angles that are congruent (In this diagram Angle IKE & Angle ITE). Given that Angle KIT is 80 degrees, and Angle KET is 60 degrees, we can find the measures of Angle IKE & ITE because we know that all angles of a quadrilateral must add up to 360 (kite is a quadrilateral). Angle KIT + Angle KET + Angle IKE + Angle ITE = 360 Angle KIT + Angle KET = 80 + 60 = 140 360 - 140 = 220 Angle IKE + Angle ITE = 220 Angle IKE = Angle ITE 220 / 2 = 110 Angle IKE = 110 Angle ITE = 110
 * Example:**

  