7, 9 and 10 respectively
A nonagon has 9 sides and a decagon has 10 sides
The 2-dimensional shape with one more vertex / side is a decagon.
A nonagon here are all the shapes and sides for help all are 2D shapes Circle=1 Not sure about this one Triangle=3 Square=4 Pentagon=5 hexagon=6 heptagon=7 octagon=8 nonagon=9 decagon=10
8 side = octagon 9 side= Nonagon 10 side= decagon
Hexagon. From Latin. The side number and the named polygon. 3 =' Trigon (Triangle) 4 = 'tetragon' 5 = pentagon 6 = hexagon 7 = heptagon 8 = octagon 9 = nonagon 10 = decagon 100 = centagob 1000 = kilagon.
A decagon has 10 sides.
7
a decagon has 10 sides- the stem deca- means ten and -gon means side, therefore decagon means a ten-sided object
It has ten sides.
Seven
A nonagon has 9 sides
A 7 sided heptagon contains 5 triangles.