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Angles, Polygons, & Triangles – Oh My!

30 May

The grade 5s have been learning about polygons, angles and triangles:

 

We looked up the definition of polygon on Etymology Dictionary dot com and foudn out it comes from the Latin and the Greek, with poly meaning many and gonos meaning angles.  Further investigations revealed that polygons are closed 2D shapes with straight sides.  Regular polygons have equal sides. 

polygons

s1eg1angles

 

Constructing & Classifying triangles:

 

TriangleClassification

 

Here is Jenna’s work trying to construct triangles that meet the crieteria in the columns and rows.  We discovered that they aren’t all possible. 

Jenna triangles

Damian figured out that the angles in a triangle add up to 180 degrees so there for there can only be one right angle or one obtuse angle. 

Stay tuned for polyhedra!  Very exciting.  The students were VERY engaged today building different polyhedra:  Here is a teaser of what’s to come!

 

polyhedra

 

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1 Comment

Posted by on May 30, 2013 in Geometry, Math

 

Tags: , , , ,

One response to “Angles, Polygons, & Triangles – Oh My!

  1. Martin Legault

    August 26, 2013 at 1:39 pm

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