Types of Triangles


Last updated on by Arikaran Kumar

Types of Triangles

Types of Triangles

In the previous blog post, we went over the basic properties of a triangle. In this post, we will examine the different types of triangles we may see.

Equilateral Triangle 

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An equilateral triangle is a triangle that has 3 equal sides and 3 equal angles.

  • Each interior angle always measures  $60^{\circ}$.

(Shown in Figure #1)

Equilateral Triangle

Figure #1

Isosceles Triangle 

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An isosceles triangle is a triangle that only has 2 equal sides and 2 equal angles.

(Shown in Figure #2)

Isosceles Triangle

Figure #2

Scalene Triangle 

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A scalene triangle is a triangle that has no equal sides and no equal angles.

(Shown in Figure #3)

Scalene Triangle

Figure #3

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Right Triangle

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A right triangle is a triangle that has an angle with a measure of  $90^{\circ}$.

  • The  $90^{\circ}$ is also known as the “right angle”.
  • A  $90^{\circ}$ angle is usually notated by the  symbol. 
  • The longest side is always opposite of the  $90^{\circ}$. angle and is called the hypotenuse.

(Shown in Figure #4)

Right Triangle

Figure #4

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