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.
Hero of Two Worlds. If there was a rock star of the American Revolution, it was a man who went by an impressively lengthy name: Marie Joseph Paul Yves Roch Gilbert du Motier, Marquis de Lafayette. Born in 1757, Lafayette was a young, handsome, rich and brave French aristocrat who defied his own king to enter the Revolutionary War in America to support the cause of freedom in the New World.