- What is the interior angle sum of a 9 sided polygon?
- What is the formula for interior angles?
- What is the sum of the interior angle of a triangle?
- What is the sum of the interior angles of a 15 sided polygon?
- What is the interior angle of a decagon?
- What is the interior angle of a 10 sided polygon?
- How many sides does a polygon have if the sum of its interior angles is 1260?
- What’s a 6 sided shape called?
- What is the sum of interior angles of a 7 sided polygon?
- How do you find the interior angle sum of a polygon?
- How do you find the sides of a polygon with the sum of interior angles?

## What is the interior angle sum of a 9 sided polygon?

Excellent.

So the interior angle of a 9 -sided polygon is 140 ° .

We can see that x and one interior angle lie on the same side of a straight line, so their sum must be 180 ° .

So x = 180 ° − 140 ° , or x = 40 ° ..

## What is the formula for interior angles?

An interior angle is located within the boundary of a polygon. The sum of all of the interior angles can be found using the formula S = (n – 2)*180. It is also possible to calculate the measure of each angle if the polygon is regular by dividing the sum by the number of sides.

## What is the sum of the interior angle of a triangle?

180°Triangle/Sum of interior angles

## What is the sum of the interior angles of a 15 sided polygon?

Each triangle has an angle sum of 180 degrees, so the sum of the interior angles of the 15-gon must be 13 × 180 = 2340 degrees.

## What is the interior angle of a decagon?

144°Decagon/Internal angle

## What is the interior angle of a 10 sided polygon?

Decagon Definitions A regular decagon has 10 equal-length sides and equal-measure interior angles. Each angle measures 144° and they all add up to 1,440° . An irregular decagon has sides and angles that are not all equal or congruent.

## How many sides does a polygon have if the sum of its interior angles is 1260?

9We know that sum of interior angles of a regular polygon is (n – 2) * 180. (1) Given sum of interior angles = 1260. n = 9. Therefore the number of sides = 9.

## What’s a 6 sided shape called?

hexagonMore than Four Sides A five-sided shape is called a pentagon. A six-sided shape is a hexagon, a seven-sided shape a heptagon, while an octagon has eight sides…

## What is the sum of interior angles of a 7 sided polygon?

The General RuleShapeSidesSum of Interior AnglesQuadrilateral4360°Pentagon5540°Hexagon6720°Heptagon (or Septagon)7900°6 more rows

## How do you find the interior angle sum of a polygon?

To find the sum of interior angles in a polygon divide the polygon into triangles. The sum of interior angles in a triangle is 180°. To find the sum of interior angles of a polygon, multiply the number of triangles in the polygon by 180°.

## How do you find the sides of a polygon with the sum of interior angles?

Subtract the interior angle from 180. For example, if the interior angle was 165, subtracting it from 180 would yield 15. Divide 360 by the difference of the angle and 180 degrees. For the example, 360 divided by 15 equals 24, which is the number of sides of the polygon.