GeometryMediumOlympiad Geometry
Olympiad Geometry · Medium problem
How many non-congruent isosceles triangles (that are not equilateral) have integer side lengths and a perimeter of ? List them, rejecting any that fail the Triangle Inequality.
How many non-congruent isosceles triangles (that are not equilateral) have integer side lengths and a perimeter of ? List them, rejecting any that fail the Triangle Inequality.