## Is any 3 sided polygon a triangle

A three-sided polygon is a triangle.

There are several different types of triangle (see diagram), including: Equilateral – all the sides are equal lengths, and all the internal angles are 60°.

Isosceles – has two equal sides, with the third one a different length.

Two of the internal angles are equal..

## What is the formula for finding the sum of interior angles

The formula for calculating the sum of interior angles is ( n − 2 ) × 180 ∘ where is the number of sides. All the interior angles in a regular polygon are equal.

## What is the sum of interior angles of a hexagon

720°Hexagon/Sum of interior angles

## How did they come up with 360 degrees

George Cantor 1 suggested that its origin can be traced to the fact that the early Babylo- nians reckoned the year to consist of 360 days during which the sum made a complete circle round the earth. This led to be division of the circle into 360 degrees, each degree being the distance traversed by the sun in one day.

## Do all shapes have 360 degrees

Well, The sum of the angle of the corners of a 3-sided shape (triangle) is 180 degrees. The sum of the angle of the corners of a 4-sided shape (quadrilaterals such as rectangles and squares) is 360 degrees. The sum of the angle of the corners of a 5-sided (pentagon) shape is 540 degrees .

## How many degrees is a 6 sided shape

720°In geometry, a hexagon (from Greek ἕξ, hex, meaning “six”, and γωνία, gonía, meaning “corner, angle”) is a six-sided polygon or 6-gon. The total of the internal angles of any simple (non-self-intersecting) hexagon is 720°.

## Do exterior angles add up to 360

The sum of exterior angles is 360°. … The exterior and interior angles add up to 180° (notice the line they sit on in the diagram). The interior angle is 180° − 72° = 108° .

## How many degrees is a 5 sided shape

540°In geometry, a pentagon (from the Greek πέντε pente and γωνία gonia, meaning five and angle) is any five-sided polygon or 5-gon. The sum of the internal angles in a simple pentagon is 540°. A pentagon may be simple or self-intersecting. A self-intersecting regular pentagon (or star pentagon) is called a pentagram.

## What is a 9 sided shape called

enneagonA nonagon is also called enneagon, which is derived from a Greek word called enneagonon, which means nine corners. The first use of the word nonagon dates back to the early 17th century, and has a Latin prefix (nona) and a Greek suffix (gon), making it a polygon with nine sides and nine angles.

## What is the formula to find exterior angles

To find the value of a given exterior angle of a regular polygon, simply divide 360 by the number of sides or angles that the polygon has. For example, an eight-sided regular polygon, an octagon, has exterior angles that are 45 degrees each, because 360/8 = 45.

## What is a 10 sided shape

decagonIn geometry, a decagon (from the Greek δέκα déka and γωνία gonía, “ten angles”) is a ten-sided polygon or 10-gon. The total sum of the interior angles of a simple decagon is 1440°.

## What shape adds up to 360

The General RuleShapeSidesSum of Interior AnglesTriangle3180°Quadrilateral4360°Pentagon5540°Hexagon6720°6 more rows

## Do all 4 sided shapes add up to 360 degrees

You would find that for every quadrilateral, the sum of the interior angles will always be 360°. … Since the sum of the interior angles of any triangle is 180° and there are two triangles in a quadrilateral, the sum of the angles for each quadrilateral is 360°.

## Can the size of an angle be more than 360

Yes, because angles can go up to 360 degrees.

## What is the sum of interior angles in a triangle

180°Triangle/Sum of interior angles

## Is the sum of interior angles always 360

A special rule exists for regular polygons: because they are equiangular, the exterior angles are also congruent, so the measure of any given exterior angle is 360/n degrees. As a result, the interior angles of a regular polygon are all equal to 180 degrees minus the measure of the exterior angle(s).

## Are hexagons 6 sides

In geometry, a hexagon can be defined as a polygon with six sides. The two-dimensional shape has 6 sides, 6 vertices and 6 angles.

## Why do the exterior angles of a triangle equal 360

An exterior angle of a triangle is equal to the sum of the opposite interior angles. For more on this see Triangle external angle theorem. If the equivalent angle is taken at each vertex, the exterior angles always add to 360° In fact, this is true for any convex polygon, not just triangles.