As shown in the figure, in the isosceles trapezoid ABCD, ad = 4cm, BC = 8cm, e is the midpoint of the waist AB, CE divides the trapezoid circumference into two parts, the difference is 3cm, and calculates the trapezoid circumference
∫ the quadrilateral ABCD is an isosceles trapezoid, e is the midpoint of the waist AB, CE divides the trapezoid perimeter into two parts ∫ AE + AD + CD - (be + BC) = 3, or (be + BC) - (AE + AD + CD) = 3, ad = 4, BC = 8, ∫ 4 + CD-8 = 3, ∫ CD = 7, or 8-4-cd = 3, ∫ CD = 1 ∫ CD = AB = 7, or CD = AB = 1 ∫ the trapezoid perimeter is 2 × 7 + 4 + 8 = 26 or 14