31.
The interior angles add up to 1800 degrees
A nineteen sided polygon is called a Nonadecagon or an Enneadecagon.
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The name of a 19 sided polygon is Enneadecagon.
Twelve square miles is the area.
The sum of twelve and what?
Yes.
The number 19.012 is written in words as "nineteen point zero twelve." Alternatively, it can also be expressed as "nineteen and twelve thousandths."
51 sum means add
The sum of a dozen is twelve.
One more that nineteen; twice; as, twenty men., An indefinite number more or less that twenty., The number next following nineteen; the sum of twelve and eight, or twice ten; twenty units or objects; a score., A symbol representing twenty units, as 20, or xx.
473
it is nineteen twenties
nineteen is not equal to the sum of one and one tenth of one hundred
609
17
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