Q:
# What shapes have no lines of symmetry?

**Some shapes that have no lines of symmetry include the scalene triangle and trapezium.** A trapezium is a four-sided flat shape with straight sides, none of which are parallel. Outside of the United States, the trapezium is called the general irregular quadrilateral.

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A line of symmetry is a line that divides a figure into two corresponding parts, each of which is the mirror image of the other. The line of symmetry is also called the mirror line and can occur in any direction. Line symmetry is also known as reflection symmetry, mirror symmetry, mirror-image symmetry or bilateral symmetry. A line of symmetry occurs in two-dimensional objects, while a plane of symmetry occurs in three-dimensional ones.

A triangle is a polygon with three edges and three vertices. Its angles always add up to 180 degrees. There are three main types of triangles that are classified according to the relative lengths of their sides: equilateral, isosceles and scalene. In an equilateral triangle, all sides have the same length. In an isosceles triangle, two sides are equal in length. In a scalene triangle, all sides are unequal and all angles are unequal. A right triangle that is not isosceles is also a scalene triangle.

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Q:
## What sort of triangle has no equal angles or sides?

A: A scalene triangle has no equal sides. There is no word for a triangle with three different angle sizes. The words describing angle sizes — right, obtuse a... Full Answer >Filed Under: -
Q:
## How many lines of symmetry does a decagon have?

A: A regular decagon has 10 lines of symmetry, one line drawn through each vertex and one line drawn through the midpoint of each edge. A line of symmetry ind... Full Answer >Filed Under: -
Q:
## How many lines of symmetry does a pentagon have?

A: A regular pentagon has five lines of symmetry. An irregular pentagon, with non-equal side lengths and internal angles, may or may not have any lines of sym... Full Answer >Filed Under: -
Q:
## How many lines of symmetry does a heptagon have?

A: A regular heptagon has seven lines of symmetry. Each one runs from a vertex to the opposite side, bisecting the side at a 90-degree angle. Full Answer >Filed Under: