In geometry, a decagon is known as a ten-sided polygon or ten-gon. The sum of the interior angles the a an easy decagon is 1440° and the amount of the exterior angle of a decagon is 360°.

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1.What is a Decagon?
2.Types of Decagon
3.Properties the Decagon
4.Decagon Formulas
5.Decagon Examples
6.Practice Questions
7.FAQs on Decagon

A decagon is a ten-sided polygon through ten vertices and ten angles.Thus, a decagon shape deserve to be identified as a polygon having actually ten sides, ten internal angles, and ten vertices. Based on the sides of a decagon, castle are broadly classified into consistent decagons and irregular decagons. A continuous decagon has actually 35 diagonals and also 8 triangles. The ar of these diagonals and triangles is explained in the later sections of this article.

Decagons deserve to be categorized together regular and also irregular decagons based on side-length and also angle measurements. There are three possible classifications the decagon the are offered below:

Regular and Irregular DecagonsConvex and Concave DecagonsSimple and complex Decagons

Regular Decagon

A regular decagon is a polygon along with10 same sides and also 10 vertices.The sides and also angles room congruent in a regular decagon. The characteristics of a consistent decagon are:

Each inner angle in regular decagon steps 144º, while each exterior angle measures 36º.


Irregular Decagon

An rarely often rare decagon go not have actually equal sides and angles. At the very least two sides and also angles are different in measurement. Look at the images given listed below showing irregular decagons.


Convex and also Concave Decagons

Like any kind of other polygon, decagons likewise can be convex and also concave. A convex decagon bulges outside as every the inner angles room lesser 보다 180°. While concave decagons have indentations (a deep recess). At least one of the internal angles is higher than 180° in concave decagons.


Simple and complicated Decagons

Simple decagons refer to decagons v no political parties crossing themselves. Lock follow all of the above said constant decagon rules. While complex decagons describe decagons that are self-intersecting and also have added interior spaces. They do not strict follow any prescribed rules of decagons concerning their inner angles and their sums.


Properties of Decagon

Some the the important properties the decagons are noted here.

The amount of the inner angles is 1440°.The amount of the dimensions of the exterior angle is 360°.The main angle actions 36 levels in the instance of a regular decagon.There are 35 diagonals in a decagon.There room 8 triangles in a decagon.

Sum that the inner Angles that Decagon

To uncover the amount of the interior angles of a decagon, first, divide it into triangles. There space eight triangle in a consistent decagon. We understand that the sum of the angle in every triangle is 180°. Thus,180° × 8 = 1440°. Therefore, the sum of every the internal angles of a decagon is1440°.We recognize that the number of sides of a decagon is 10. Hence, we divide the total sum of the inner angles by 101440° ÷ 10 = 144°Thus, one interior angle of a continuous decagon shape is 144°. And, the sum of all the inner angles that a decagon is 1440°.

Measure of the main Angles that a continual Decagon

To uncover the measure of the main angle the a consistent decagon, we must drawa circle in the middle. A circle develops 360°.Divide this by ten, since a decagonhas 10 sides. 360° ÷ 10 = 36°. Thus, the measure of the central angle that a consistent decagon is36°.


Decagon Diagonals

A diagonal line is a heat that have the right to be drawn from one vertexto another. The variety of diagonals the a polygon is calculated by:n(n−3) ÷ 2. In decagon, n is the variety of sides i beg your pardon is same to 10, so n=10. Currently we get,n(n−3) ÷ 2 = 10(10−3) ÷ 2Thus, the number of diagonals in a decagon is 35.

Decagon has actually 8 Triangles

By joining one vertex come the remaining vertices that the decagon,8 triangles will be formed. By joiningall the vertices individually to each other, climate 80 triangle (8×10) will certainly be formed. Look at the image offered below, reflecting diagonals and triangles that a decagon.


Decagon Formulas

Like other shapes, a constant decagon additionally has the formula to calculateperimeter andarea. The formulas are stated below:

The formula to discover the area the a decagon is (dfrac5a^22 imessqrt5 + 2sqrt5),where ais the measurement of the side-length of the decagon.

The formula to find the perimeter of a regular decagon is 10 time of a next or 10 × n, wherein n is the side-length of the decagon (as all sides room equal and also total sides room 10). In the instance of an rarely often rare decagon, we can simply include the side lengths to find the perimeter.

Important Notes

A decagon has actually ten sides.The sum of the internal angles the a decagon is1440°.The sum of the exterior angle of a decagon is360°.A continuous decagon has actually 35 diagonals.Decagons deserve to be classified as regular, irregular, convex, concave, simple, and complex.

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