# data[].attributes.attachment_link.description
PowerPoint-turned-video to help my students with the classification of triangles.

# data[].attributes.attachment_link.keywords[]
grade 4  free math games practice common core standards

# data[].attributes.attachment_link.title
Types Of Triangles - Grade 4 - Practice with Math Games

# data[].attributes.attachment_link.description
Practice identifying right, obtuse and acute triangles.

# data[].attributes.attachment_link.readable_text
These triangles belong to three different families.

All the triangles in the same family are the same shape.

But they may not be the same size or the same way up.

Can you sort them out and explain how you did it?

You could print off pictures of the triangles ( here as a Word document or here as a pdf), then cut them out and sort them practically. Or if you prefer, you could use the interactivity below to try out your ideas:

# data[].attributes.attachment_link.description
Can you sort these triangles into three different families and explain how you did it?

# data[].attributes.attachment_link.description
Mr. Rogers creates a song to help Geometry students classify triangles by sides and angles. This song also helps students remember the different congruency theorems and postulates. Here are the lyrics. Now where to start? They called it a triangle because it has three angles that add up to 180.

# data[].attributes.attachment_link.title
Classifying Triangles Song [Parody of Lorde’s Royals]

# data[].attributes.attachment_link.description
Remember that the sum of the angle measures in the triangle is 180o. This is true for all triangles.

# data[].attributes.attachment_link.title
Practicing Geometry math: 'Classify triangles'

# data[].attributes.attachment_link.description
Fun math practice! Improve your skills with free problems in 'Classify triangles' and thousands of other practice lessons.