In the isosceles triangle ABC, ab = AC = 12cm, De is the vertical bisector of the waist AB, de intersects AB to D, BC to e, and BC = 20cm

In the isosceles triangle ABC, ab = AC = 12cm, De is the vertical bisector of the waist AB, de intersects AB to D, BC to e, and BC = 20cm

De is the vertical bisector of waist AB = > AE = be = > AE + EC = be + EC = BC = 20cm
The perimeter of triangle AEC = AE + EC + AC = BC + AC = 32cm
Give me a point