Sounds like an isosceles triangle, with the line of symmetry from the third angle to the mid-point of the third side.
Chat with our AI personalities
Pentagon
rhombus
A kite.
A Kite
There is no such shape. A 2d shape with 5 sides and all equal angles must be a regular pentagon (or a 5-pointed star if you stretch the definition of "all angles"). And a regular pentagon - or star - has 5 lines of symmetry.