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.
In 1775, at just 18 years old, Gilbert du Motier (Marquis de  Lafayette) left France and volunteered to serve in the Continental  Army. Having received extensive military trâ¦aining by the age of 13,  he was found qualified for important positions in the army under  George Washington.