Alabama Learning Exchange
Alex: Quilting With My Pal, Pythagoras!
For this unit lesson, students will learn about the Pythagorean Theorem and how it is evident in our everyday world. Students will apply the concept of the Pythagorean Theorem to the squares of a quilt. Each quilt square will be designed...
Alabama Learning Exchange
Alex: Growing in a Triangle
Middle school students explore the Pythagorean Theorem by measuring and calculating diagonal lengths using the Pythagorean Theorem. Students view an animated proof of the Pythagorean Theorem. They access an Internet site to view and...
Alabama Learning Exchange
Alex: Pythagorean Theorem: Prove It
During this lesson, eighth grade students will be introduced to the Pythagorean Theorem: a2+b2=c2. They will construct a right triangle on graph paper and draw squares on each side of the triangle. A quiz link requires Java, and another...
PBS
Pbs: Solve the Ratio and Proportion Problem Beyond a Shadow of a Doubt
In this video, Harry finds money on the sidewalk. He uses ratio, proportion, and some knowledge about shadows to return it to the rightful owner. In the accompanying classroom activity, students investigate whether there is a consistent...
Hunkins Experiments
Hunkin's Experiments:how to Measure the Height of a Tree
Hunkin's Experiments is a group of simple cartoon illustrations of scientific principles. Some would work well in the classroom, but others have little value beyond entertaining students. All of the projects are easy to do. This part...
Sophia Learning
Sophia: Using Similar Triangles to Make Indirect Measurements
This lesson explains why similar triangles can be used to make indirect measurements, and provides an example.
Sophia Learning
Sophia: Using Similar Triangles to Make Indirect Measurements: Lesson 5
This lesson explains why similar triangles can be used to make indirect measurements, and provides an example. It is 5 of 5 in the series titled "Using Similar Triangles to Make Indirect Measurements."
University of Virginia
University of Virginia: Indirect Measurement
This site contains an exercise that teaches about indirect measurements, used in this case to describe objects we cannot see.
National Council of Teachers of Mathematics
Nctm: Figure This: Nctm Math Challenge Three Squares (Pdf)
If you think you can handle the Pythagorean Theorem, then this is a math challenge you should try. Explore geometric relationships and measurement in this one page activity from the NCTM Math Challenges for Families series.
National Council of Teachers of Mathematics
The Math Forum: Drexel Math Forum: Distance to an Object
Dr. Math offers a way to calculate the altitude of a triangle using only the lengths of the sides of the triangle. He briefly explains how this was used by the Egyptians long ago.
National Council of Teachers of Mathematics
The Math Forum: Drexel Math Forum: Pythagorean Theorem
Dr. Math explains how to find distances indirectly by using the Pythagorean theorem.