Because the Romans, like many ancient cultures, considered the year to start at the beginning of Spring. That makes March the first month, and September the seventh month. And it continues on from there too: OCTober = 8 NOVember = 9 DECember = 10 If you have a Bible around the house, have a look at the descriptions of the Hebrew festivals in the Old Testament. Passover, which begins at the first Full Moon in Spring, is described as being celebrated in the "first month", whereas the festival of Sukkot ('Tabernacles') ... beginning at the first Full Moon in Autumn (the Harvest Moon) ... is described as a celebration in the "seventh month".
It has 7 sides
A heptagon sometimes known as a septagon has 7 sides
A heptagon with anything other than 7 sides is not an heptagon!
A heptagon has 7 sides and 7 vertices.
A septagon or a heptagon both have 7 sides
It has 7 sides
A heptagon sometimes known as a septagon has 7 sides
A heptagon with anything other than 7 sides is not an heptagon!
A heptagon has 7 sides and 7 vertices.
A septagon or a heptagon both have 7 sides
A heptagon has 7 sides and 7 internal angles. It also has 7 external angles. A regular heptagon has 7 equal sides
a heptagon
A Heptagon has seven sides.
A heptagon has 7 sides.
A regular heptagon has seven sides.
A heptagon has 7 sides and 7 vertices.
a heptagon has 7 sides