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4th grade
Course: 4th grade > Unit 11
Lesson 4: Classifying trianglesTypes of triangles review
Review ways to classify triangles based on their sides lengths and angles. Practice classifying triangles.
Classifying triangles by their angles
Acute triangles
An triangle has . Below are examples of .
Right triangles
A triangle has and acute angles. Below are examples of .
Obtuse triangles
An triangle has and acute angles. Below are examples of .
Want to learn more about classifying triangles? Check out this video.
Want to try more problems like this? Check out this exercise
Classifying triangles by their side lengths
Equilateral triangles
An triangle has . Below are examples of triangles.
Isosceles triangles
An triangle has . Below are examples of triangles.
Scalene triangles
A triangle has . Below are examples of triangles.
Want to try more problems like this? Check out this exercise.
Want to join the conversation?
- Why can't I go back to selecting? I got a wrong and I can't go back(69 votes)
- It just won't let you.(12 votes)
- why is the isosceles triangle and the equilateral both classified as each other(43 votes)
- because an equilateral triangle is all equill sides and an isosceles triangle is two or more equill sides(17 votes)
- Is their any more triangle practices?(21 votes)
- No. You will have to do them over if you want extra practice.(11 votes)
- Why are triangles used in math?(14 votes)
- it is because it uses geometry(6 votes)
- I don’t understand why an equilateral triangle is constantly being defined as and Isosceles triangle.(9 votes)
- An equilateral triangle has 3 equal length sides. An isosceles triangle has at least 2 sides of the same length. Thus all equilateral triangles are also isosceles.(25 votes)
- if all of the angels are acute but lenghths are different what is that?(6 votes)
- um whenever i double tap a question it ameatiatily says its wrong(11 votes)
- dont double tap just tap and check(8 votes)
- I'm starting sixth grade next year, and I'm already at unit 4 lesson 2. I started doing it this summer for hobby work, because I wanted to be an architect, but I had not studied geometry so I went ahead to study ALL the geometry. Does anyone think I overdid it?(11 votes)
- As long as you can understand what you are studying, you can go as far as you want to go.(9 votes)
- i got my one right but it said i got it worng(11 votes)
- I... I think that means you got it wrong, but you don't understand. You might want to check your answer or ask someone else to explain it to you.(2 votes)
- this was so easy ;-; >:((5 votes)
- ITS NOT IF YOUR ON AN IPAD! Sorry but you must drag the lines together and it’s really frustrating.(14 votes)