According to historians, the geometrical principles shaped up in ancient times, probably as result of the need in art, architecture and measurement. Building and construction of magnificent palaces, temples, lakes, dams and cities, art and also architecture propped up these ideas. Now let us study couple of Geometrical Concepts, lock are

Polygon angle Triangle square CirclePolygon

A polygon is a simple closed curve consisted of entirely of line segments. A polygon contends least 3 sides. The line segments forming a polygon are dubbed its sides and also the points at which the sides satisfy are called vertices.

You are watching: Each line segment in a polygon is called a

In the example the political parties of polygon ABCDE are AB, BC, CD, DE and EA. political parties AE and ED meet at E, for this reason E is a vertex of the polygon ABCDE. Any kind of two sides v a common end allude are dubbed the nearby sides of the polygon.

The bag of nearby sides space AB and BC; BC and CD; CD and DE; DE and EA; EA and AB. The finish points the the very same side the a polygon are referred to as the adjacent vertices. The bag of surrounding vertices are: A and B; B and C; C and D; D and E; E and A. The joins of bag of vertices which space not surrounding are referred to as the diagonals that the polygon. The diagonals are

Angles

Angles are made when corners space formed. As soon as two rays have actually a common end point, then two rays together are said to type an angle. An edge is consisted of of two rays beginning from a usual end point. The two rays creating the angle are dubbed the arms or sides of the angle. The common end suggest is the vertex of the angle. To display an angle we usage a small curve in ~ the vertex. Symbol for angle is "".

To name an angle 2 points, one on each side and also the vertex space used. Thus, ∠ POQ is a much better way of naming the angle instead of ∠ O. In specifying the angle, the crest is constantly written as the middle letter. The angle additionally has three parts linked with it, which are the interior, exterior and also on the angle.

Triangle

A triangle is a three-sided polygon. In fact, that is the polygon with the least number of sides. Symbol because that triangle is

.

A triangle has three sides, 3 angles and also three vertices. Being a polygon, a triangle has an exterior and an interior.

The inner angles room those on the inside of the triangle. The inner angles that a triangle always add up to 180°

In triangle ABC,

The three sides the the triangle are
The 3 angles are ∠BAC, ∠BCA and ∠ABC. The points A, B and C are referred to as the vertices of the triangle.Quadrilateral

A four sided polygon is a quadrilateral. It has actually 4 sides, 4 vertices and 4 angles. Frameworks like electric towers exploit triangular shapes and not quadrilaterals as the triangle is really rigid and also hence a strong shape. Once we press inward at any one peak of the triangle the triangle does not gain distorted.

The vertices are called in a cyclic manner.