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 A to Z Teacher Stuff Forums Types of Triangles

#1
02-01-2010, 04:16 PM
 Deeena Cohort Join Date: Apr 2005 Posts: 510 United States 3rd Grade Teacher
Types of Triangles

Does anyone have any good "tricks" to help the kids remember the difference between an equilateral, scalene, and isosceles triangle? My kids get equilateral because it has the word "equil" in it, but they're having trouble with the other two. We have done songs, poems, practice, but some are still having trouble identifying.

#2
02-01-2010, 06:47 PM
 czacza Multitudinous Join Date: Sep 2001 Posts: 21,957 New Jersey Grade 3
Scalene- ne stands for not equal
Isosceles-2 e's in the word, 2 equal sides
#3
02-01-2010, 06:48 PM
 Aliceacc Multitudinous Join Date: Apr 2006 Posts: 26,837 NEW YORK Math teacher
I've never used this, but it just occurred to me:

We have TWO Eyes-- so ISosceles is two!
#4
02-01-2010, 07:32 PM
 czacza Multitudinous Join Date: Sep 2001 Posts: 21,957 New Jersey Grade 3
Quote:
 Originally Posted by Aliceacc I've never used this, but it just occurred to me: We have TWO Eyes-- so ISosceles is two!
Love it!!
#5
02-01-2010, 10:01 PM
 Upsadaisy Moderator Join Date: Aug 2002 Posts: 16,004 Florida
Also, isosceles has SOS - side/other/side. Two sides the same length.

And scalene - like scale. Each step is different, each side is different.
#6
02-02-2010, 06:38 PM
 Deeena Cohort Join Date: Apr 2005 Posts: 510 United States 3rd Grade Teacher
Thanks! I will use these tricks tomorrow.
#7
02-02-2010, 11:03 PM
 HeatherY Habitué Join Date: Nov 2008 Posts: 794 Substitute Teacher
Maybe you have't reached angles yet, but.....

Acute- it's a cutie! With the little kid voice. My math teacher in high school did that and I never forgot it. Then he did obtuse in a big man voice. It worked.
#8
02-03-2010, 03:12 AM
 ms. yi Comrade Join Date: Jul 2009 Posts: 283 Florida 1st Grade Teacher
Register for studyjams.com through scholastic. It says you have to pick a plan but it's actually an unlimited free trial. They have a song on the different types of triangles.
#9
02-03-2010, 08:34 PM
 cheerfulfifi Novice Join Date: Jul 2008 Posts: 56 Pennsylvania 2nd Grade Teacher
I once did a lesson where we created triangles with straws and twist ties (to connect the ends). They had to cut up the different lengths of the straws to see the difference between the different types.

This may help for those who need a hands on visual.
#10
02-03-2010, 08:36 PM
 cmorris Comrade Join Date: Jul 2005 Posts: 362
I use the 2 eyes trick. My kids never forget it!

 Tags triangles, types

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