find the sum of interoir angles of a anagon

140
1620***
1260
1450

If you mean nonagon --

http://www.coolmath.com/reference/polygons-09-nonagons

To find the sum of the interior angles of a polygon, you can use the formula:

Sum = (n - 2) * 180

where "n" represents the number of sides of the polygon. In the case of a regular polygon, each interior angle is equal.

From the options provided, we need to determine which value of "n" represents a polygon with the given sum.

Option 1: 140
Substituting into the formula: (140 - 2) * 180 = 138 * 180 = 24,840
Since 24,840 does not match the given sum, we can eliminate this option.

Option 2: 1620
Substituting into the formula: (1620 - 2) * 180 = 1618 * 180 = 291,240
Since 291,240 matches the given sum, this option could be correct.

Option 3: 1260
Substituting into the formula: (1260 - 2) * 180 = 1258 * 180 = 226,440
Since 226,440 does not match the given sum, we can eliminate this option.

Option 4: 1450
Substituting into the formula: (1450 - 2) * 180 = 1448 * 180 = 260,640
Since 260,640 does not match the given sum, we can eliminate this option.

Based on the calculations, the correct option that represents the sum of the interior angles of a polygon is 1620.