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Based on 365 days divided into 18 months, each with 20 days. The remaining 5 days where bad luck days.
The Xiuhpohualli
time measuring calender was used for the time to plant crops
Which was determined by
the sun and the moon
Today's
Nations
are trying to
reconnect
with the
Past
Aztec Mathematics
Counting on the Past
to understand the future
The Aztecs used two different calenders, one used for religious festivals
The other for planting of crops and harvesting
Such as arrows, hands, heads, and hearts
They used symbols to represent
their measurements of fractions
Thru Mathematics the Aztecs developed an ingenious aqueduct system
The Tonalpohualli
was the ritual calender
A 260 day calender, it
is neither lunar or
solar but rather
20 Ventas (months) with
13 Trecendas (Day)
Periods. Each controlled
by a different Deity
The Aztecs built an empire to rival the Greeks and Romans
Lines and dots, it seems so simple but yet so complicated
Shells=0
Dots(.)=1
Lines(_)=5
They counted on a base 20 system, believed because that's the number of fingers and toes