That's a triangle in which all three sides have three different lengths.
A Square has four equal length sides
A square (i am pretty sure) has 2 sets of parallel sides and four parallel sides.
Each of its 6 sides is adjacent - to four other sides.
a quadrilateral
There is no specific name for a four-sided polygon with unequal sides.
QUARDILATERAL
A trapezoid.
A shape with four unequal sides is called an irregular quadrilateral.
Quadrilateral
a quadrilateral trapezoidA polygon with four unequal sides is a quadrilateral, as is a square, rectangle, trapezoid and parallelogram.
The general name for a plane shape with four sides is a quadrilateral.
a rectangle (that is NOT a square) has 4 right angles and consecutive sides of unequal lengths.
The polygon with four unequal sides is known as a trapezium. Outside of North America is called a general irregular quadrilateral.
rhombus
Most non-regular quadrilaterals.
Impossible.