Properties of symmetry: - Students may notice symmetry in the isosceles and equilateral triangles and non-symmetry in the scalene triangles Informal recognition of these properties may be helpful in ...

Three lines of symmetry on an equilateral triangle. Right-angled triangles follow the same rules as other triangles. It's not the right angle that matters but whether the triangle is scalene or ...

This means that this triangle is scalene. A scalene triangle has no sides that are congruent. Again, if the measurements were not labelled, you would still know it is a scalene triangle because ...