Bridges to Algebra and Geometry -
4th Edition

Chapter 12: Measurement

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12.1 Similar Figures

http://www.regentsprep.org/Regents/math/geometry/GP11/LMoresimilar.htm
NEW This page gives the requirements for figures to be considered similar.

http://www.mathsisfun.com/geometry/similar.html
NEW This page defines similar figures and introduces the geometric transformations that yield similar figures, including practice problems.

http://www.math.com/school/subject1/lessons/S1U2L4GL.html
This site defines similar figures.

12.2 Dilations

http://www.regentsprep.org/Regents/math/geometry/GT3/Ldilate.htm
NEW This site presents an intuitive understanding of dilations. More advanced content is available, if desired.

http://www.mathwarehouse.com/transformations/dilations/dilations-in-math.php
NEW This page gives several example dilations and includes practice problems.

http://www.mathsisfun.com/geometry/resizing.html
NEW This page presents the concept of dilations as “resizing,” including practice problems.

12.3 Scale Drawings and Maps

http://www.wikihow.com/Draw-a-Floor-Plan-to-Scale
NEW This page describes the steps to construct a scaled floor plan.

12.4 12.5 Perimeter and Area of Polygons

http://www.mathsisfun.com/area.html
NEW This page provides the area formulas for many basic polygons, and tips for working with irregular shapes, including practice problems.

http://www.regentsprep.org/regents/math/algebra/as1/indexAS1.htm
NEW This site includes links to several pages discussing area calculations, including hints and practice problems.

12.6 Perimeter and Area of Similar Polygons

http://www.regentsprep.org/Regents/math/geometry/GP11/LMoresimilar.htm
NEW This page summarizes the relationship on perimeter, area, and more aspects of similar figures.

http://www.mathwarehouse.com/geometry/similar/triangles/area-and-perimeter-of-similar-triangles.php
NEW This page discusses the area and perimeter of similar triangles, with practice problems.

12.7 Circles

http://www.mathsisfun.com/geometry/circle.html
NEW This page presents the parts and features of circles, including practice problems.

http://teachingmath.info/pie.htm
NEW This page derives the value and use of pi in circle calculations with an unusual approach, perhaps making it easier to remember.

http://www.piday.org
NEW This site is devoted to interesting facts and knowledge of pi, including a listing of one million digits of pi.

http://www.angio.net/pi
NEW This page includes a very fast search engine to find sequences of digits (e.g., your birthdate) in the value of pi, and links to files with many digits of pi.

Bridges to Algebra and Geometry - 4th Edition