An isosceles triangle has one line of symmetry, which is drawn from the noncongruent side to the opposite vertex, and does not have a rotation symmetry.
You cannot have one parallel line. There must be another line that it is parallel to. Also, 1 symmetry is meaningless - you can have one axis of symmetry or rotational symmetry of order one. The answer will depend on which one it is.
Rotational symmetry of order 1.
NO
Order 2.
Just 1.
Rotational symmetry 2 1 as it is then the second when it is turned half way of a full turn.
not possible
Nothing has 1 order of rotational symmetry because in rotational symmetry 1 is none.
none shapes have 1 rotational symmetry because in rotational symmetry one is none
polygon!
You cannot have one parallel line. There must be another line that it is parallel to. Also, 1 symmetry is meaningless - you can have one axis of symmetry or rotational symmetry of order one. The answer will depend on which one it is.
Rotational symmetry of order 1.
It has 1 order of rotational symmetry.
Not necessarily, except rotational symmetry of order 1.
An arrow (→) has one line of symmetry. A double-headed arrow (↔) has two lines of symmetry and rotational symmetry if you want to claim it.
Every right circular cone, conic section, and regular polygon has at least one line of symmetry.
Every right circular cone, conic section, and regular polygon has at least one line of symmetry.