Classifying Triangles (Equilateral, Isosceles, or Scalene)

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5th Grade Classifying Equilateral Isosceles Scalene Triangles GameFifth Grade Identify Equilateral Isosceles Scalene Triangle Game

Digital Math Activity - Classifying Triangles as Equilateral Isosceles or Scalene

Get ready to put your fifth grade students' geometry skills to the test with this interactive math lesson from! In this online geometry game, students will practice classifying triangles as equilateral, isosceles, or scalene. Here are the learning outcomes you can expect from your students upon completion of this digital math game:

  • Identify the triangle shown as equilateral, isosceles, or scalene based on the given lengths of its sides.
  • Choose the triangle that matches the description: equilateral, isosceles, or scalene, based on the given lengths of its sides.
  • Classify the triangle as equilateral, isosceles, or scalene based on the written lengths of its sides.

Questions in this classifying triangles activity are presented in drag-and-drop format and multiple-choice format. If students need a little extra help classifying a triangle in one of the math questions, they can click on the "Hint" button. They will be shown a detailed pictorial or written clue that will remind them of the properties of triangles without giving away the answer. When students answer a question incorrectly, a detailed explanation page will show them the correct answer accompanied by an easy-to-understand explanation, giving them the opportunity to learn from prior mistakes and improve accuracy throughout their math practice session.

Several built-in features help your students make the most out of their online geometry practice session. For example, a progress-tracker in the upper-right corner of the practice screen shows students how many questions they have answered so far out of the total number of questions in the lesson. Beneath that, a score-tracker lets students see how many points they have earned for correct answers. Opposite, a speaker icon, indicating the read-aloud feature, can be clicked by students if they want to hear the question read aloud to them in a clear voice. This is an excellent resource for ESL/ELL students and children who excel with auditory learning. Each of these tools was designed by the I Know It team to help your students achieve math practice success!

5th Grade Classifying Equilateral Isosceles Scalene Triangles LessonFifth Grade Identify Equilateral Isosceles Scalene Triangle Lesson

Develop Geometry Skills with Online Math Practice

Whether you are an elementary math teacher, homeschool educator, or school administrator, you'll have plenty to love about the I Know It online math practice program. Here are just a few of the features of our program that teachers especially appreciate:

  • Wide variety of math activities covering essential math topics from kindergarten through fifth grade
  • Common Core-aligned math lessons written by accredited elementary teachers just like you
  • Math activities organized on our website by grade level and topic, for quick access and easy assignments

Teachers aren't the only ones who enjoy using the I Know It digital math platform in their classrooms—students love practicing their math skills with our program too! It's easy to see why kids enjoy using to practice elementary math skills, like classifying triangles:

  • Plenty of positive feedback messages encourage students to "Keep going!" even when they make mistakes
  • Adorable, animated characters await students in their math practice sessions, ready to cheer them on with a silly dance or a clever trick
  • Math awards are given each time students master new math milestones - students collect math awards in their virtual trophy case, and you can print out the award certificates to celebrate their achievements together as a class
  • The bright colors and bold design of the I Know It math activities create an exciting, educational, and age-appropriate math practice experience

We hope you and your fifth-grade class will enjoy classifying triangles by their sides as equilateral, isosceles, or scalene in this interactive math lesson. Be sure to check out the hundreds of other 5th grade math lessons we have available on our website as well.

Try Interactive Math Games with a Free Trial

Did you know you can try out this fifth grade geometry activity, as well as any math lesson on, at no cost? You can! Sign up for a free thirty-day trial and explore online math games with your elementary class. You'll see why teachers and students everywhere love our online math program. We hope you won't hesitate to join our wonderful community as a member when your free trial runs out. This way, you and your students can continue to enjoy the many benefits of digital math practice for a full calendar year. We offer membership options for families, individual teachers, schools, and school districts. Visit our membership information page to discover which I Know It membership is right for you:

Your I Know It membership gives you complete access to the program's handy administrative features. These tools will help you maximize your students' math practice experience by:

  • Changing basic lesson settings, such as turning the animated characters on/off or limiting the number of hints per lesson
  • Viewing, printing, downloading, and emailing detailed progress reports for each of your students
  • Assigning unique usernames and passwords to all of the students on your class roster
  • Giving specific lesson assignments to different students

Your students will log into using their unique login credentials. From the kid-friendly homepage, your students will be able to find and launch the math practice activities you have assigned to them for practice. If you choose to give them the option through your administrator settings, students can also explore other math activities at their grade level and beyond for extra practice or an added challenge. Grade levels are designated by letters (i.e., "Level E" for fifth grade), making it easy for you to assign math lessons based on each child's unique needs and skill level.

5th Grade Classifying Equilateral Isosceles Scalene Triangles ActivityFifth Grade Identify Equilateral Isosceles Scalene Triangle Activity


This interactive math lesson is classified as Level E. It may be ideal for a fifth-grade class.

Common Core Standard

4.G.1, 4.G.2, MA.5.GR.1.1, 5.5A

Draw And Identify Lines And Angles, And Classify Shapes By Properties Of Their Lines And Angles.
Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.

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