Isosceles (adjective)

Having two equal sides and two equal angles.

Origin:

Late 16th century: from latin isosceles, from greek isoskelēs, from is- "equal" + skelos "leg".

Examples:

1. An isosceles triangle has two equal sides.
2. The isosceles trapezoid had two sides of equal length.
3. The isosceles pentagon had two equal angles.
4. The isosceles shape is symmetrical along its axis.
5. Isosceles triangles are a type of congruent triangle.