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Based on their angles, triangles are classified as the following four types: Right-Right are those that have at least one angle of 90 degrees. Obtuse -Obtuse are those that have an angle that measures more than 90 degrees but less than 180 degrees.
- Equilateral Triangle
- Isosceles Triangle
- Scalene Triangle
- Acute Triangle
- Right Triangle
- Obtuse Triangle
Equilateral triangle is the most common type used while learning the basics of the shape. Here, the three sides are equal to each other along with the three angles measuring 60°. An equilateral triangle is considered a regular polygon with angles and sides equal.
The word isosceles is derived from the Greek word 'iso' which means same and 'skelos' which means leg. This type of triangle has two sides of the same length. The two equal sides of an isosceles triangle are called the legsand the angle between them is called the vertex angleor apex angle.
A scalene triangle is a triangle with all three sides of different lengths along with three angles of different measures. This shape does not have a line of symmetry i.e. no matter where a line is drawn through a scalene triangle, the left and right sides of the line will never be equal to each other. Triangles can also be classified on the basis o...
Acute triangle is a type of triangle where all three interior angles are acute anglesor less than 90°. The sides of an acute-angled triangle can be equal or unequal depending on whether the triangle is equilateral, isosceles, or scalene.
A right-angled triangle is a triangle with one of the angles as 90 degrees. A 90-degree angle is called a right angle, and hence the triangle with a right angle is called a right triangle. Here, the relationship between the sides is understood with the help of the Pythagoras rule. The side opposite to the right angle is the largest side and is refe...
An obtuse-angled triangle or obtuse triangle is a type of triangle whose one of the vertex angles is bigger than 90° and the sum of the other two angles is less than 90°. The side opposite to the obtuse angle is considered the longest. The different types of triangles are also classified according to their sides and angles as follows: 1. Equilatera...
Create free printable worksheets (PDF or html) for classifying triangles by their sides, angles, or both. You can control the number of problems, workspace, border around the problems, image size, and additional instructions.
Jan 21, 2020 · Learn how to classify the 3 types of triangles. Review the triangle sum and exterior angle theorems, and finish up with writing two column proofs.
Students classify triangles as equilateral (3 equal sides), isosceles (2 equal sides), scalene (all sides have different lengths) or as a right triangle (one angle of 90 degrees). Browse all of our geometry worksheets, from the basic shapes through areas and perimeters, angles, grids and 3D shapes. What is K5?
Classifying triangles worksheets enable students in identifying the type of triangles based on their sides or angles or both. Based on their sides triangles can be classified into an equilateral triangle (all equal sides), isosceles triangle (two sides equal) and scalene triangle (unequal sides).
The worksheet guides students through the process of identifying the various properties of triangles and how to use them to classify the triangles. Additionally, it can help them to learn the key vocabulary and concepts associated with classifying triangles.
