There are enormous numbers of shapes that cannot be split into perfect and equal halves. They are said to be asymmetrical. An example of this would be a scalene triangle. It is impossible to split this triangle into two halves, and hence it does not possess reflection symmetry property.
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Does a scalene triangle have reflection symmetry? – All you need to know

What triangles have reflection symmetry?
An isosceles triangle is a type of triangle that has exactly onefold reflection symmetry at all times. One line or one division will break the whole figure into two symmetrical parts, which is known as 1fold reflection symmetry. 
Does a scalene right triangle have reflection symmetry?
A scalene triangle has no lines of symmetry. It has rotational symmetry of order 1. It has no equal sides and no equal angles. 
Which triangle does not have reflective symmetry?
scalene triangle 
Can scalene triangles have symmetry?
All angles of a scalene triangle are unequal. A scalene triangle has no line of symmetry. The angle opposite to the longest side would be the greatest angle and vice versa. All sides of the given scalene triangle are unequal. 
Part of a video titled Line Symmetry and Reflection Symmetry Explained! – YouTube
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Which of the following is an example of reflection symmetry?
A rectangle is an example of a shape with reflection symmetry. A line of reflection through the midpoints of opposite sides will always be a line of symmetry. A rectangle has two lines of symmetry. You can imagine folding the rectangle along each line of symmetry and each half of the rectangle would match up perfectly. 
How do you find reflection symmetry?
If any object can be divided into two halves such that one half forms the mirror image of the other half, then the object is known to be Symmetrical. Whereas, if both the halves are not mirrored images of each other, then the object is said to be asymmetrical. 
How many symmetry does scalene triangle have?
Scalene triangle has three lines of symmetry. 
How much lines of symmetry does a scalene triangle have?
A scalene triangle has zero lines of symmetry because none of the angles or sides are equal. 
Is scalene symmetrical?
The division of triangles into scalene, isosceles, and equilateral can be thought of in terms of lines of symmetry. A scalene triangle is a triangle with no lines of symmetry while an isosceles triangle has at least one line of symmetry and an equilateral triangle has three lines of symmetry. 
Which of the following triangles has no line of symmetry?
A scalene triangle is a triangle that has three unequal sides and hence it has no line of symmetry. 
How many symmetry are there in scalene triangle?
Scalene triangle has no equal sides and no equal angles so the number of line of symmetry in a scalene triangle id Zero. 
How many symmetry does scalene triangle have?
A scalene triangle has three lines of symmetry. 
Which type of triangle has exactly one line of symmetry?
An isosceles triangle can be drawn that has only 1 line of symmetry.
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