why is the isosceles triangle and the equilateral both classified as each other

because an equilateral triangle is all equill sides and an isosceles triangle is two or more equill sides

Is their any more triangle practices?

No. You will have to do them over if you want extra practice.

um whenever i double tap a question it ameatiatily says its wrong

dont double tap just tap and check

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?

As long as you can understand what you are studying, you can go as far as you want to go.

i got my one right but it said i got it worng

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.

I don’t understand why an equilateral triangle is constantly being defined as and Isosceles triangle.

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.

this was so easy ;-; >:(

ITS NOT IF YOUR ON AN IPAD! Sorry but you must drag the lines together and it’s really frustrating.

Main content

4th grade

Course: 4th grade > Unit 11

Lesson 4: Classifying triangles

Types of triangles review

Google Classroom

Review ways to classify triangles based on their sides lengths and angles. Practice classifying triangles.

Classifying triangles by their angles

Acute triangles

acute

triangle has

3 angles that

each measure less than 90^{\circ}

. Below are examples of

acute triangles

Right triangles

right

triangle has

1 angle that measures 90^{\circ}

and

2

acute angles. Below are examples of

right triangles

Obtuse triangles

obtuse

triangle has

one angle that measures

more than 90^{\circ}

and

2

acute angles. Below are examples of

obtuse triangles

Want to learn more about classifying triangles? Check out this video.

Problem 1A

Classify $△ P Q R$ ‍ by its angles.

Want to try more problems like this? Check out this exercise

Classifying triangles by their side lengths

Equilateral triangles

equilateral

triangle has

three equal sides

. Below are examples of

equilateral

triangles.

Isosceles triangles

isosceles

triangle has

\underset{―}{at least}

two equal sides

. Below are examples of

isosceles

triangles.

Scalene triangles

scalene

triangle has

no equal sides

. Below are examples of

scalene

triangles.

Problem 2A

Classify $△ P Q R$ ‍ by its sides.

Want to try more problems like this? Check out this exercise.

Want to join the conversation?

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TJ
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- 28fcoraggio
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kezia bukuru
Posted 4 years ago. Direct link to kezia bukuru's post “why is the isosceles tria...”
why is the isosceles triangle and the equilateral both classified as each other
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(43 votes)
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- Ryan Gati
  Posted 4 years ago. Direct link to Ryan Gati's post “because an equilateral tr...”
  because an equilateral triangle is all equill sides and an isosceles triangle is two or more equill sides
  Comment on Ryan Gati's post “because an equilateral tr...”
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Kumo yamashita
Posted 6 years ago. Direct link to Kumo yamashita's post “Is their any more triangl...”
Is their any more triangle practices?
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(21 votes)
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- naokantey
  Posted 6 years ago. Direct link to naokantey's post “No. You will have to do t...”
  No. You will have to do them over if you want extra practice.
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Noah Remetan
Posted 4 years ago. Direct link to Noah Remetan's post “Why are triangles used in...”
Why are triangles used in math?
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(14 votes)
Answer
- ethan.smidt
  Posted 10 months ago. Direct link to ethan.smidt's post “it is because it uses geo...”
  it is because it uses geometry
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  (7 votes)
Nyaruyoma
Posted 5 years ago. Direct link to Nyaruyoma's post “I don’t understand why an...”
I don’t understand why an equilateral triangle is constantly being defined as and Isosceles triangle.
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(9 votes)
Answer
- Nights Dawn
  Posted 4 years ago. Direct link to Nights Dawn's post “An equilateral triangle h...”
  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.
  Comment on Nights Dawn's post “An equilateral triangle h...”
  (26 votes)
julia beltran
Posted 6 years ago. Direct link to julia beltran's post “if all of the angels are ...”
if all of the angels are acute but lenghths are different what is that?
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(6 votes)
Answer
- 😇Diego😈
  Posted a year ago. Direct link to 😇Diego😈's post “its scalene”
  its scalene
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  (11 votes)
Emma
Posted 2 years ago. Direct link to Emma's post “um whenever i double tap ...”
um whenever i double tap a question it ameatiatily says its wrong
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(11 votes)
Answer
- 😇Diego😈
  Posted a year ago. Direct link to 😇Diego😈's post “dont double tap just tap ...”
  dont double tap just tap and check
  Comment on 😇Diego😈's post “dont double tap just tap ...”
  (9 votes)
daisyoverhill5
Posted 4 months ago. Direct link to daisyoverhill5's post “I'm starting sixth grade ...”
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?
Button navigates to signup pageComment on daisyoverhill5's post “I'm starting sixth grade ...”
(11 votes)
Answer
- Ian Pulizzotto
  Posted 4 months ago. Direct link to Ian Pulizzotto's post “As long as you can unders...”
  As long as you can understand what you are studying, you can go as far as you want to go.
  Button navigates to signup page
  (10 votes)
middleton.daveyon
Posted 4 years ago. Direct link to middleton.daveyon's post “i got my one right but it...”
i got my one right but it said i got it worng
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(11 votes)
Answer
- daisyoverhill5
  Posted 4 months ago. Direct link to daisyoverhill5's post “I... I think that means y...”
  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.
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  (2 votes)
Alyssa
Posted 5 years ago. Direct link to Alyssa's post “this was so easy ;-; >:(”
this was so easy ;-; >:(
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(5 votes)
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- Avinash
  Posted 4 years ago. Direct link to Avinash's post “ITS NOT IF YOUR ON AN IPA...”
  ITS NOT IF YOUR ON AN IPAD! Sorry but you must drag the lines together and it’s really frustrating.
  Comment on Avinash's post “ITS NOT IF YOUR ON AN IPA...”
  (15 votes)