A scalene triangle, like any other triangle, has zero diagonals. This is because a diagonal is drawn between two vertices that are not adjacent to each other. In a triangle, each vertex is adjacent to both others, so no diagonals exist.
In general, for a polygon with n sides, for each vertex there are n-3 adjacent vertices (that is, all vertices excluding the vertex itself and its two neighbors). However, each diagonal is incident upon two vertices, so one must divide by 2. The number of diagonals is then n(n-3)/2. This does not depend upon the lengths of the sides of the polygon, only upon the number of sides.
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Yes, a scalene triangle can be a triangle.
what is a properties of scalene triangle
You cannot. An isosceles triangle cannot be scalene and a scalene triangle cannot be isosceles. So an isosceles scalene triangle cannot exist.
A scalene triangle is a triangle with all sides of different lengths.
yes a scalene triangle is a isosceles triangle.* * * * *No. A scalene triangle is not an isosceles triangle. The sides of a scalene triangle must all be of different lengths. In an isosceles triangle two of the sides must be the same length. If all three sides are different (scalene) then two cannot be the same (isosceles).