If you are talking about the triangle: An isosceles triangle has two sides of equal length. Sometimes it is specified as having two and only two sides of equal length, and sometimes as having at least two sides of equal length. If you are talking about the trapezoid (or trapezium):
The Marquis de Lafayette at Valley Forge. The Marquis de Lafayette, who joined the Continental Army at age nineteen in the summer of 1777 as a volunteer Major General, spent most of December 1777 and January 1778 with George Washington and his Continental Army troops at their winter quarters at Valley Forge. During that long, harsh winter, the ill-equipped Americans suffered in many ways.
Built in 1975, a statue of Lafayette stands atop a fountain in the courthouse square in LaGrange, Georgia. Equestrian statue by Paul Bartlett, Metz, France 1919, destroyed by German occupation forces and replaced by another statue by M . Goutin in 2004; Statue of Lafayette on Union Avenue & Warren Street in Havre de Grace, Maryland, 1976