1) An isosceles trapezoid 2) Having two equal sides 3) Kind of triangle 4) Symmetric 5) Symmetrical 6) Trapezoid type 7) Triangle or trapezoid type 8) Triangle with two equal sides 9) Type of triangle 1) Symmetric 2) Symmetrical 
• (a.) Having two legs or sides that are equal; -- said of a triangle.
Having two sides of the same length, as in the case of an isosceles triangle. An isosceles trapezoid in the United States is the equivalent of a trapezium in Britain. 'Isosceles' comes from the Greek iso (same or equal) and skelos (legs).
I·sos'ce·les adjective [ Latin , from Greek ...; 
[adj] - (of a triangle) having two sides of equal length
isosceles 1. Designating a triangle with two equal sides or legs. 2. A description of a trapezoid (quadrilateral that has two parallel sides) in which the two nonparallel sides are of equal length.
(of a straight-sided plane figure) having two sides equal:See diag. under an isosceles triangle; an isosceles trapezoid.
A polygon with two sides of equal length.