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3-triangle, 4-square/rectangle/rhombus (in general, quadrilateral), 5-pentagon, 6-hexagon, 7-heptagon, 8-octagon, 9-nonagon, 10-decagon
Names for shapes that have equal sides are called EQUILATERAL.
rhombus
Polygonal (2-d) shapes get their (not there) names from the number of sides; polyhedra (3-d) shapes get their names from the number of faces.The names of other shapes: circles, ellipses, torus, cardioid etc have different origins.
The names of shapes based on the number of sides up to 10 are as follows: Triangle (3 sides) Quadrilateral (4 sides) Pentagon (5 sides) Hexagon (6 sides) Heptagon (7 sides) Octagon (8 sides) Nonagon (9 sides) Decagon (10 sides)
A shape with three sides is called a triangle. A shape with ten sides is called a decagon.