Determine The Type Of Triangle That Is Drawn Below

Unraveling the Secrets of Triangle Classification: A Journey into Shapes and Angles

In the vast world of geometry, triangles stand as iconic figures, captivating the minds of mathematicians, artists, and architects alike. Each triangle possesses a unique identity, determined by the lengths of its sides and the angles between them. Embark on a journey to understand the intricacies of triangle classification and unravel the mysteries that lie within these geometric marvels.

The Enigmatic Triangle: Unveiling Its Secrets

Have you ever encountered a triangle and wondered, “What type is it?” This seemingly simple question conceals a web of complexities, as triangles come in various shapes and forms. The challenge lies in understanding the underlying patterns and relationships that define each type of triangle. Whether you’re a student navigating geometry’s intricacies or an architect designing structures that defy gravity, mastering triangle classification is a fundamental step towards unlocking the secrets of these enigmatic shapes.

A Glimpse into the Triangular Spectrum: Unveiling the Treasure Trove of Triangle Types

As we delve into the world of triangles, we discover a diverse array of categories, each with its own distinct characteristics. From the equilateral triangle, with its three equal sides and angles, to the isosceles triangle, adorned with two equal sides and a unique apex angle, the realm of triangles is a tapestry of geometric wonders. The scalene triangle, with its three unequal sides and angles, completes this captivating triad of fundamental triangle types. Beyond these elementary forms, we venture into the realm of right triangles, where one angle stands at a proud 90 degrees, unlocking a treasure trove of unique properties.

Navigating the Labyrinth of Triangle Types: A Roadmap for Classification

To successfully determine the type of triangle before you, embark on a methodical journey of observation and analysis. Initiate your quest by examining the lengths of the sides. Should you encounter three sides of equal length, you have stumbled upon an equilateral triangle. If two sides share an equal bond, while the third side stands distinct, you have encountered an isosceles triangle. In the absence of equal sides, you have stumbled upon the enigmatic scalene triangle, where each side possesses its own unique measure. Should one angle within your triangle stand at a proud 90 degrees, you have encountered a right triangle, possessing properties that set it apart from its brethren.

Determine The Type Of Triangle That Is Drawn Below

Triangle with two sides of the same length

Determining the Type of Triangle Based on Side Lengths: An Informative Analysis

Triangles, among the fundamental geometric shapes, are characterized by three sides and three vertices. Classifying triangles based on their side lengths is a key concept in geometry, enabling us to understand and analyze their properties. This comprehensive article delves into the various types of triangles, focusing on the relationship between their side lengths and the resulting classification.

1. Equilateral Triangle:

Equilateral triangle

  • Definition: An equilateral triangle is a triangle in which all three sides are of equal length.
  • Properties:
  • All three angles are equal, measuring 60 degrees.
  • The centroid, incenter, and circumcenter coincide at the same point.
  • Examples: Regular hexagons and equilateral prisms.

2. Isosceles Triangle:

Isosceles triangle

  • Definition: An isosceles triangle has two sides of equal length.
  • Properties:
  • The base angles (opposite the equal sides) are equal.
  • The altitude from the vertex to the base bisects the base and divides the triangle into two congruent right triangles.
  • The median from the vertex to the base is also an altitude and bisector of the base.
  • Examples: Rhombuses and isosceles trapezoids.

3. Scalene Triangle:

Scalene triangle

  • Definition: A scalene triangle has all three sides of different lengths.
  • Properties:
  • None of the angles or sides are equal.
  • The sum of the interior angles always equals 180 degrees.
  • The exterior angle is equal to the sum of the opposite interior remote angles.
  • Examples: Most triangles encountered in real-life applications.

4. Right Triangle:

Right triangle

  • Definition: A right triangle is a triangle in which one of the interior angles measures 90 degrees.
  • Properties:
  • The side opposite the right angle is called the hypotenuse.
  • The Pythagorean theorem applies: a^2 + b^2 = c^2, where ‘a’ and ‘b’ are the lengths of the other two sides, and ‘c’ is the length of the hypotenuse.
  • The area of a right triangle is calculated as (1/2) * base * height.
  • Examples: 3-4-5 triangles, isosceles right triangles, and Egyptian triangles.

5. Obtuse Triangle:

Obtuse triangle

  • Definition: An obtuse triangle is a triangle in which one of the interior angles measures greater than 90 degrees.
  • Properties:
  • The side opposite the obtuse angle is the longest side.
  • The sum of the two acute angles is always less than 90 degrees.
  • The area of an obtuse triangle can be calculated using the formula (1/2) * base * height.
  • Examples: Most triangles formed by random lines.

6. Acute Triangle:

Acute triangle

  • Definition: An acute triangle is a triangle in which all three interior angles measure less than 90 degrees.
  • Properties:
  • All three sides are shorter than the sum of the other two sides.
  • The largest angle is opposite the longest side.
  • The area of an acute triangle can be calculated using the formula (1/2) * base * height.
  • Examples: Equilateral triangles, isosceles triangles, and 30-60-90 triangles.

Triangles, with their distinct side length relationships, form the foundation of geometry and have extensive applications in various fields. Understanding the different types of triangles, their properties, and classification criteria is essential for comprehending and analyzing geometric concepts. This article has provided a comprehensive overview of various triangle types based on their side lengths, equipping readers with a deeper understanding of this fundamental geometric shape.


  1. What is the most common type of triangle?
    Scalene triangles are the most commonly encountered triangles, as they have all three sides of different lengths.

  2. How can we determine the type of a triangle given its side lengths?
    Compare the lengths of the sides to identify if all sides are equal (equilateral), two sides are equal (isosceles), or all sides are different (scalene).

  3. What are the properties of a right triangle?
    Right triangles have one angle measuring 90 degrees, and the Pythagorean theorem (a^2 + b^2 = c^2) applies to their side lengths.

  4. Which triangle has all three sides of equal length?
    Equilateral triangles



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