Scalene triangle - is one in which all three sides are different (and no angles are equal).
Scales (scalene) on lots of fish in the sea but every scale is different.
A scalene triangle with all three sides different lengths.
With all three sides different each angle will be different too.
A triangle with three sides of different lengths will be scalene
A triangle with sides 6cm, 8cm and 10cm would be a scalene.
A triangle with three different angles will be scalene.
As well as all the sides being different lengths, all the internal angles of a scalene triangle are different.