Meaning, Types And Parts Of A Triangle

Meaning, Types And Parts Of A Triangle

Definition Of Triangle In Geometry

A triangle can be define as a plane figure bonded by three straight lines with three angles

Parts Of A Triangle

Below are the components of a triangle.

1. Basis: It is the horizontal part of the triangular.

2. Base AnglesThe two angles at the ends of every base are known as base angles.

3. Vertical AngleThis is the 3rd angle, opposite the base angle.

4. Vertex It is this point where the vertical angle is created.

5. attitude or height: This is the perpendicular distance that extends from an equilateral triangle to the vertex.

Parts Of A Triangle

Types Of Triangles

Here are all the types of triangle you need to know.

Right-angled Triangle:

This is a triangle that is characterized by one of its angles of 90deg


  • Draw an imaginary line of length.
  • Draw another line PQ parallel to PR.
  • Draw a line from point Q to point P. Thus QPR = 90deg
  • Join Q and R to form the hypotenuse.

Right-angled Triangle

Right Angled Triangle.

Equilateral Triangle:

It is a triangle that is composed of three sides with three angles.


  • Draw an horizontal line PR = 100mm/10cm using an Tee-square.
  • Slide the tee below the line, then place the set square of 30deg/60deg onto it.
  • Draw lines of 60deg at each of the ends at the meeting baseline Q.
  • Join lines PQ and QR.
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Equilateral Triangle

Equilateral Triangle.

Isosceles triangle

It is a triangle with two sides that are equal in length; consequently, two angles are identical, typically the base angles.


  • Create a horizontal baseline CD equal to 50mm.
  • With the points with C as your center, make use of your compass and draw two arcs having a radius of 70mm.
  • Join the ends of the triangle to make a triangle.

Isosceles triangle

Isosceles Triangle.

Scalene Triangle:

This triangular shape has three angles, and the three sides aren’t equal.


Make a vertical line of PQ = 100mm

By using two different radii, PR = 30mm and QR = 70mm, draw two arcs so that they join at R

Scalene Triangle

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