An isosceles triangle has exactly one line of symmetry.
Umm a ?
polygon!
an irregular hexagon... __/\__ \ / \ / \ /
A kite.
It is a regular pentagon!
A circle. One side, zero angles. Also a line as it is a 1-dimensional shape.
As isosceles triangle.
Yes. Think of a kite shape. Symmetry along its length but no parallel sides.
An isosceles triangle - a triangle with two sides of equal length.
A kite.
It could be an arrowhead (delta) or a kite.
Regular polygon with any number of sides, circle, ellipse, isosceles triangle, rectangle, isosceles trapezium, kite, arrowhead.
Maybe its the shape of cylinder which has 2 congruent sides and 1 rounded body.