triangle angle sum 5 videos
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Angles
Pre-Algebra Introductory Geometry
Vocabulary of angles and how to measure an angle with a protractor
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Similar Triangles
Pre-Algebra Introductory Geometry
Overview of similarity: congruent angles, proportional corresponding sides
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Area and Perimeter of Triangles
Pre-Algebra Introductory Geometry
Understanding why the area of a triangle is 1/2 base times height
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Factoring Greatest Common Factor
Pre-Algebra Polynomials
Factoring is turning a sum or difference into a product
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Polygons
Pre-Algebra Introductory Geometry
Naming polygons, classifying triangles, and classifying quadrilaterals
