SimilarPolygons
LearningObjectives
- Recognizesimilarpolygons.
- Identifycorrespondinganglesand sidesof similarpolygonsfrom a statementof similarity.
- Calculateand applyscalefactors.
Introduction
Similarfigures,rectangles,triangles,etc., havethe sameshape.Sameshape,however, is not a precise
enoughterm for geometry. In this lesson,we’ll learna precisedefinitionfor similar, and applyit to measures
of the sidesand anglesof similarpolygons.
SimilarPolygons
Lookat the trianglesbelow.
- The triangleson the left arenotsimilarbecausethey are not the sameshape.
- The trianglesin the middlearesimilar. Theyare all the sameshape,no matterwhattheir sizes.
- The triangleson the rightaresimilar. Theyare all the sameshape,no matterhow they are turnedor
whattheir sizes.
Lookat the quadrilateralsbelow.