Triangle in English

Mô tả sản phẩm

The English word for a triangle is simply "triangle". This shape is defined as a polygon with three sides and three angles.

Types of Triangles

Based on Sides

Triangles can be classified into three types based on the length of their sides:

• Equilateral Triangle: All three sides are equal in length.
• Isosceles Triangle: Two sides are equal in length.
• Scalene Triangle: All three sides are of different lengths.

Based on Angles

Triangles can also be classified based on their angles:

• Right-angled Triangle: One angle is a right angle (90 degrees).
• Acute-angled Triangle: All three angles are acute (less than 90 degrees).
• Obtuse-angled Triangle: One angle is obtuse (greater than 90 degrees).

Properties of Triangles

Triangles have several important properties, including the fact that the sum of their internal angles always equals 180 degrees. Other properties relate to their area, perimeter, and relationships between sides and angles (such as the Pythagorean theorem for right-angled triangles).

Triangle in Geometry

Triangles are fundamental shapes in geometry. They are used extensively in various mathematical proofs and applications, from calculating areas and volumes to understanding more complex geometric figures.

Using "Triangle" in a Sentence

Here are some example sentences using the word "triangle":

• The architect designed a building with a triangular roof.
• The child drew a perfect equilateral triangle.
• The surveyor used a triangle to measure the distance between two points.

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