These activity sheets will give your students practice in identifying the different types of triangles.

How do we classify triangles: Triangles are regular polygons with three sides and three angles. They are classified based on their angles and sides. The measurements of these angles and sides may be different or the same size, there only maybe one distinctive angle; any two angles or sides may be of equal measurements. These shapes has different type of shapes and sizes. We differentiate them by their sides or angles. Sides - An accurate measurement of triangle sides helps us to classify triangles. You will need to mark triangle sides that are congruent. Three sides of the scalene triangle have different measurements. But they don't have congruent sides. In an isosceles triangle, two sides have exactly the same measurement. All three sides of equilateral triangle have the same measurement. All equilateral triangles are isosceles triangle that has two congruent sides of the triangle. Angles - We can classify triangles by their angles and it has different types. All three angles of an acute triangle are less than 90 degrees. We need one right angle and two acute angles to make right angles. Obtuse versions have angles that are greater than 90 degrees and two acute angles. We need two congruent angles. Based on their sides, triangles are classified as the following three types: Equilateral - As the name implies, equilateral are those that have all the three sides of the same measurement. Isosceles - Isosceles are those shapes that two sides of equal measurement Scalene -Scalenes are those that have all three sides of different measurements. 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. Acute -Acute are those that have all the angles of less than 90 degrees. Equiangular -Equiangulars are those that have all its angles of the same measurement.

We explore the six main classifications of triangles. We can classify them by the angles that exist with a triangle. An acute has three acute angles. An obtuse has one obtuse angle. A right has one right angle. We can also classify them by their sides. In an equilateral it has all equal side lengths. If a triangle has two equal sides (in length) it referred to as isosceles. If none of the sides are equal length it is called a scalene triangle. These worksheets explains how to classify triangles as isosceles, scalene, equilateral, right, acute, or obtuse. Students may be given the measurements of the sides or angles, or may have to measure them for themselves.

Print Classifying Triangles Worksheets

Classifying Triangles Lesson

This worksheet explains how to classify triangles. A sample problem is solved, and two practice problems are provided.

Worksheet

Students will name all the given triangles.

Practice Worksheet

Students will classify the triangles based on drawings or descriptions.

Review and Practice

Students review how to classify triangles. Six practice problems are provided.

Classifying Quiz

Students will demonstrate their proficiency naming triangles.

Skill Check

Students will name what is taking place for each problem. Three problems are provided, and space is included for students to copy the correct answer when given.

Basic Skills Practice

Students will classify triangles based on the lengths of their sides.

Basic Skills Drill

Look at the angles to figure out which works best for you.

Classifying Triangles Intermediate Skills Worksheet

Students will practice classifying triangles by looking at drawings.

Intermediate Skills Practice

Students will use the drawings to categorize the shapes.

Intermediate Skills Drill

Students will practice work with these three sided shapes so more.

Identifying Triangles Lesson

This worksheet explains how to identify a triangle as isosceles, scalene or equilateral. A sample problem is solved.

Lesson and Practice

This worksheet reviews how to identify a triangle as isosceles, scalene or equilateral. A sample problem is solved, and two practice problems are provided.

Worksheet

Students will sort out if a triangle is isosceles, scalene or equilateral by using pictures.

Identifying Triangles Practice

Given a pictures, students will identify a triangle as isosceles, scalene or equilateral.

Measurement Drill

Students will identify a triangle as isosceles, scalene or equilateral based on measurements. Eight problems are provided.

Class Warm Up

Take your time and tell if a triangle is isosceles, scalene or equilateral. Three problems are provided.

Naming Triangles Lesson

This worksheet explains how to categorize the shapes as isosceles, scalene, equilateral, right, acute, or obtuse. A sample problem is solved, and two practice problems are provided.

Naming Worksheet

Students will categorize the shapes as isosceles, scalene, equilateral, right, acute, or obtuse based on drawings and descriptions.

Naming Practice

Based on drawings or descriptions, students will identify triangles as isosceles, scalene, equilateral, right, acute, or obtuse.

Review and Practice

Students review six classifications of triangles. Six practice problems are provided.

Quiz

Students will demonstrate their proficiency grouping triangles isosceles, scalene, equilateral, right, acute, or obtuse.

Naming Triangles Check

Students will classify the triangles. Three problems are provided, and space is included for students to copy the correct answer when given.

Right, Acute, or Obtuse Triangles Lesson

This worksheet explains how to identify a triangle as right, acute, or obtuse. A sample problem is solved.

Lesson and Practice

This worksheet reviews how to identify a triangle as right, acute, or obtuse. A sample problem is solved, and two practice problems are provided.

Right, Acute, or Obtuse Triangles Worksheet

Students will by using pictures to determine a category for each shape.

Practice

The choices are right, acute, or obtuse.

Student Drill

Students will practice this skill for a while more. Eight problems are provided.

Class Warm Up

Students will identify a triangle as right, acute, or obtuse. Three problems are provided.

Classifying and Measuring Triangles Lesson

This worksheet explains how to distinguish each the shapes according to their shape and measurements. A sample problem is solved.

Lesson and Practice

This worksheet reviews how to distinguish each the shapes according to their shape and measurements. A sample problem is solved, and two practice problems are provided.

Classifying and Measuring Worksheet

Students will rank the shapes according to their shape and measurements.

More Practice

Given a pictures, students will rank the shapes according to their shape and measurements.

Classifying and Measuring Triangles Drill

Students will classify triangles according to their shape and measurements. Eight problems are provided.

Measures Worksheet

Tell us more about the triangles that you are presented with.

Classifying and Measuring Warm Up

Students will classify triangles according to their shape and measurements. Three problems are provided.