Tipos de triángulos: explicación y ejemplos
In Geometry, a triangle is the most important shape, defined as a closed two-dimensional diagram containing 3 sides, 3 angles, and 3 vertices. In simple words, a triangle is a polygon with 3 sides. The word triangle is taken from the Latin word ‘triangulus,’ which means three-cornered.
During ancient times, astronomers had created a method called triangulation to determine the distances of the distant stars. They measure the distance from two different locations, then measure the angle created by shift or parallax, formed by the observer’s movement between the two locations. Then they used to apply the law of sines for calculating the required distance.
The Egyptians created the pyramids around 2900 B.C. Its shape is actually that of a 3D pyramid, which has triangular faces. It is a perfectly engineered model that its lengths and angles on all sides are the same. Miletus (624 BC – 547 BC), a Greek mathematician, adopted Egypt’s geometry and was brought to Greece.
Aristarchus (310 BC – 250 BC), a Greek mathematician, used the above method to find the distance between the Earth and the Moon. Eratosthenes (276 BC – 195 BC), again, used the same method to determine the distance around the surface of Earth (called circumference).
A triangle is a two-dimensional closed figure with 3 sides. It is a polygon with three corners, three vertices, and three angles joined together that forms a closed diagram. We use the symbol ∆ to denote a triangle.
name="classification-of-triangles-according-to-the-measure-of-interior-angles">Classification of triangles according to the measure of interior angles
name="classification-of-triangles-according-to-the-length-of-their-sides">Classification of triangles according to the length of their sides
An equilateral triangle has all three sides equal, and all three interior angles equal, too. In this case, each interior angle of an equilateral triangle is 60 degrees. An equilateral triangle is sometimes referred to as an equiangular triangle because all three angles are equal.
- A triangle is a 2-D polygon
- A triangle has 3 sides, 3 angles, and 3 vertices.
- The sum of lengths of any two sides of a triangle is more than the remaining side’s length.
- The sum of the lengths of the three sides gives the perimeter of triangles.
- The area of a triangle is equal to the product of the base and the height.
- Traffic Signs: Most of the traffic signs are displayed on triangular structures.
- The Pyramids of Egypt: Pyramids are ancient monuments constructed by Egyptians. Pyramids are triangular in shape.
- Truss: The trusses of roofs or bridges are fabricated in a triangular shape because a triangle is considered the strongest shape.
- The Bermuda Triangle: The Bermuda Triangle is a triangular area in the Atlantic Ocean where it is believed that any ship or aircraft that passes at the point is swallowed. 50 ships and 20 air crafts are believed to have been mysteriously disappeared at the Bermuda Triangle.
- Global Positioning System (GPS) works on triangulation algorithms to determine an object’s longitude and latitude.
- A ladder leaning against a wall makes the shape of a triangle.
- The Eiffel Tower is triangular in shape.
- The triangles concept calculates the height or altitude of tall objects such as flag posts, mountains, buildings, etc.
- Sandwiches and pizza slices are triangular-shaped.