Triangle || Part 01 || Triangle And Its Parts

Triangle And Its Parts

Triangle :- A polygon with three edges, three vertices and three angles is called Triangles. A triangle with vertices A, B, and C is denoted by ∆ABC.

Note:–

* It is one of the basic shapes in geometry. 

* A Triangle has three angles so it is called Triangle (with three angles).

* A Triangle has three sides so it may be called Trigon. (with three angles).

* Contents of Triangle

A triangle consists of various parts. It has 3 sides, 3 vertices and 3 angles.

1. Vertexes :- The corner or meeting point of the two sides of triangle is called vertexs of triangle.

There are three vertices in a triangle which is denoted by capital letters, A, B and C.

Vertexes

1. Vertex 1 :- A

2. Vertex 2 :- B

3. Vertex 3 :- C

2. Sides :- The line joining the two vertexes of triangle is called Sides of triangle.

There are three Sides in a triangle which is denoted by capital letters, AB or BA, BC or CB and CA or AC.

Sides

1. Side 1 :- AB or BA

2. Side 2 :- BC or CB

3. Side 3 :- CA or AC

Vertex of triangle is denoted by capital letters, A, B and C.

3. Angles :- The depression between two sides at a vertex is called Angle. 

There are three Angles in a triangle which is denoted by the symbol of angle (∠). 

It is denoted in three ways

∠A or AB or BA, AB or BC or CB and AB or CA or AC.

Angles

1. Angle 1 :- ∠A or ∠BAC or ∠CAB

2. Angle 2 :- ∠B or ∠ABC or ∠CBA

3. Angle 3 :- ∠C or ∠ACB or ∠BCA

In this the desired angle is written in between ∠A or ∠BAC or ∠CAB