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1/2*(n2-3n) = 665 diagonals where n means number of sides

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Q: How many diagonals does a polygon with 38 sides have?
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The number of diagonals that can be drawn in a polygon with n sides can be determined by nn - 32 How many diagonals can be drawn in a polygon with 10 sides?

38 diagonals


What is the sum of a interior angle of a polygon with 38 sides?

Sum of interior angles of a 38 sided polygon: (38-2)*180 = 6480 degrees


How many sides on a polygon with the sum of the interior angles is 6840?

If the polygon has n sides, the sum of the interior angles is (n - 2)*180 degrees. So (n - 2)*180 = 6840 (n - 2) = 6840/180 = 38 So n = 38 + 2 = 40 sides.


What is a 38 sided polygon called?

A 38-sided polygon would be named a triacontaoctagon.


What is the sum of the interior angle measures of a 21-sided polygon?

The sum of the interior angles of a polygon is 2n - 4 right angles where n is the number of sides. When n = 21 then 2n - 4 = 42 - 4 = 38 right angles = 38 x 90 = 3420°. NOTE : If the polygon is a regular polygon then each interior angle measures 3420 ÷ 21 = 162.86°.


How many triangles does a 38 sided polygon contain?

It contains 36 triangles


How many sides do 2 nonagons and 2 decagons have in all?

38 sides


What are the sum of the interior angles of a polygon with 40 sides?

The sum of the interior angles of a polygon can be calculated using the formula: [ \text{Sum of interior angles} = (n - 2) \times 180^\circ ] where (n) is the number of sides of the polygon. For a polygon with 40 sides ((n = 40)): [ \text{Sum of interior angles} = (40 - 2) \times 180^\circ = 38 \times 180^\circ = 6840^\circ ] Thus, the sum of the interior angles of a polygon with 40 sides is **6840 degrees Read more....tinyurl com/22enuvst


One pair of corresponding sides of two similar polygons measures 12 and 15 The perimeter of the smaller polygon is 30 Find the perimeter of the larger?

The perimeter of the larger polygon will have the same ratio to the perimeter of the smaller as the ratio of the corresponding sides. Therefore, the larger polygon will have a perimeter of 30(15/12) = 37.5, or 38 to the justified number of significant digits stated.


What degrees is each interior angle of a 38 sided polygon?

Providing that it is a regular 38 sided polygon then each interior angle will measure: 170o31'34.74''


What is 38 sided shape called?

an irregular polygon


What is the number of sides of a regular polygon if one angle measures 171 degrees?

The formula to find the sum of the angles of a polygon is: 180(n - 2) Since we know that one angle of this regular polygon is 171 degrees, we can find what kind of polygon it will be, using the formula: 180(n - 2) = 171n 180n - 360 = 171n 180n - 171n = 360 9n = 360 n = 360/9 n = 40 Thus the polygon is a 40-sided polygon. Check: 180(40 - 2) = 180(38) = 6840, which is the sum of the angles of the polygon. 6840/40 = 171 degrees, which is the measure of one of the angles of that polygon .