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Web It
Chapter 8
8.1 1
For an interactive site that explains how to find the perimeter of rectangles and
squares, go to link:
http://www.webmath.com/geo_rectangle.html
8.1 2
Want to try a puzzle involving perimeters? Use the hardest category and make it
challenging! Every time you get it right, you get a piece of the puzzle at link:
http://tinyurl.com/bxttr
8.1 3
For the perimeter (circumference) of a circle, visit the interactive website at link:
http://www.webmath.com/geo_circle.html
8.2 1
For a lesson on finding the areas of rectangles and squares, including a quiz that
will tell you if your answer is correct, visit link:
http://freewind.legend.co.uk/~calverms/mesh04q2.htm
8.2 2
For a PowerPoint presentation dealing with the areas of rectangles and squares, go
to link:
www.graves.k12.ky.us/powerpoints/elementary/winapowers.ppt
8.2 3
To see a demonstration of how the formula for the area of a triangle is obtained
(similar to the one in the text), visit link:
http://www.mathleague.com/help/geometry/area.htm#areaofatriangle
8.2 4
For a simple lesson using the formula for the area of a parallelogram, with
interactive problems, try link:
http://www.cut-the-knot.org/Curriculum/Geometry/AreaOfParallelogram.shtml
8.2 5
If you want to make your own parallelogram and discover what the area of a
parallelogram should be, try link:
http://illuminations.nctm.org/ActivityDetail.aspx?id=47
8.2 6
To see how the area of a trapezoid is derived, go to link:
http://www.mathleague.com/help/geometry/area.htm#areaofatrapezoid
8.2 7
For an excellent lesson detailing the terminology associated with circles (radius,
diameter, etc.) as well as the calculation of the area of a circle, with exercises that
contain applications and answers, go to link:
http://www.mathgoodies.com/lessons/vol2/circle_area.html
8.3 1
To learn about the volumes of rectangular and other solids, try link:
http://www.leeric.lsu.edu/bgbb/7/ecep/math/o/o.htm
8.3 2
For a well illustrated lesson on finding the volume of a rectangular solid, visit link:
http://www.leeric.lsu.edu/bgbb/7/ecep/math/o/o.htm
8.3 3
To learn how to find the volume of a rectangular solid using an interactive
approach, go to link:
http://www.analyzemath.com/Geometry_calculators/volume_surface_solid_rec.html
8.3 4
For a brief lesson with a video tutorial showing how to find the volume of a
rectangular solid, try link:
http://www.mhhe.com/math/devmath/aleks/wt-bm/student/olc/sl01sec33.htm
8.3 5
To try an interactive lesson (press Start; they give you the radius and height of the
cylinder and you enter the answer), go to link:
http://www.aaamath.com/geo79-volume-cylinder.html
8.3 6
For a lesson on finding the volume of a cylinder, go to link:
http://www.leeric.lsu.edu/bgbb/7/ecep/math/o/o.htm
8.3 7
If you want a calculator to do the work for you (enter the radius and the height),
there is one at link:
http://www.analyzemath.com/Geometry_calculators/surface_volume_cylinder.html
8.3 8
For a very brief lesson dealing with the volume of a sphere (press Start; they give
you a diameter, you enter the answer), visit link:
http://www.aaamath.com/B/geo79_x8.htm
8.3 9
For the usual interactive lesson on finding the area of a cone (press Start; you are
given the diameter and height of the cone, enter the answer), try link:
http://www.aaamath.com/geo79-volume-cone.html
8.4 1
For a detailed lesson on angles, visit link:
http://www.mathleague.com/help/geometry/angles.htm#whatisanangle
8.4 2
If you want to select a related topic, try link:
http://www.mathleague.com/help/geometry/angles.htm
8.4 3
For an excellent lesson on how to classify and measure angles, log on to link:
http://www.math.com/school/subject3/lessons/S3U1L4GL.html
8.4 4
For an animated version dealing with different types of angles, go to link:
http://www.utc.edu/Faculty/Christopher-Mawata/geom/geom.htm
8.4 5
For a lesson on complementary and supplementary angles, go to link:
http://www.utc.edu/Faculty/Christopher-Mawata/geom/geom1.htm
8.4 6
For an animated presentation of complementary and supplementary angles, visit
link:
http://www.utc.edu/Faculty/Christopher-Mawata/geom/geom1.htm
8.4 7
For a lesson on how angles can be classified (by angles or by sides, you choose), try
link:
http://www.geom.uiuc.edu/~demo5337/Group3/triangle.html
8.4 8
For a well illustrated, animated lesson dealing with the classification of angles, visit
link:
http://www.shodor.org/interactivate/discussions/Angles/
8.4 9
For a procedure on how to find the measure of the third angle in a triangle, try link:
http://www.aaamath.com/B/geo612x5.htm
8.4 10
For an animated version of the fact that the angles in a triangle add to 180 degrees,
see link:
http://www.walter-fendt.de/m11e/anglesum.htm
8.4 11
To see a proof that the sum of the measures of the angles in a triangle is 180 degrees,
visit link:
http://tinyurl.com/mktf
8.5 1
For a good lesson discussing square roots, try link:
http://tinyurl.com/mtxq
8.5 2
To continue the lesson, visit link:
http://tinyurl.com/mty8
8.5 3
Want to try a game finding square roots? Go to link:
http://www.quia.com/mc/65631.html
8.5 4
For an old fashioned table of square roots (up to 100), visit link:
http://www.factmonster.com/ipka/A0875883.html
8.5 5
For an interactive lesson detailing how square roots work, go to link:
http://www.webmath.com/simpsqrt.html
8.5 6
For everything you ever wanted to know about Pythagoras, try link:
http://www.mathsnet.net/dynamic/pythagoras/
8.5 7
For an excellent lesson on the Pythagorean theorem, with explanations, examples,
and procedures on how to use the theorem, visit link:
http://www.math.com/school/subject3/lessons/S3U3L4DP.html
8.5 8
If you want to see many proofs of the theorem, point your browser to link:
http://tinyurl.com/j0w9