Melody Casey
Material Type:
Lesson Plan
Middle School
  • GEDB
  • Global Education
    Creative Commons Attribution Non-Commercial

    Education Standards

    GEDB Pythagoras and His Theorum (Lesson 4 of 6)

    GEDB Pythagoras and His Theorum (Lesson 4 of 6)


    Students will now be given less in the way of instructions and will have to find what missing measure is being asked for. This lesson was developed by Michael Tinker as part of their completion of the North Carolina Global Educator Digital Badge program. This lesson plan has been vetted at the local and state level for standards alignment, Global Education focus, and content accuracy.

    Lesson Plan


    Students will now be given less in the way of instructions and will have to find what missing measure is being asked for.


    Learning Targets and Criteria for Success


    Students will take the information they have gathered in the prior lessons and will make calculations based on certain scenarios.

    Learning Tasks and Practice

    Lesson Procedures: 

    We first start off by going over the prior day’s homework assignment which will let me know just how well they did in assimilating the information and will also serve to get their brains back up to speed on what to do.

    Next, we will talk about finding any missing measure in a right triangle.  Yesterday’s work only pertained to finding the hypotenuse so that was pretty straight forward.  Today’s work will not tell them what they are looking for so they will have to do a little more thinking.  The examples they are given may or may not show where the right angle is and may not just jump out at them with what they need to do.  They may have to find a leg or a hypotenuse.

    To globalize this we found an example of a made to order cabinet maker in Italy.  This manufacturer will build to your specifications but has to make certain that the people placing the order know what they’re asking for as there are no returns.  Being that it is a custom product there is no shop to go to to look at what they make and Italy is obviously too far away to go visit the plant where they are made.  The problem is that people will just say they want a cabinet to fit a 55 inch tv for example.  Well, that’s the diagonal measure of the tv and that doesn’t really help the cabinet maker as they need to have a width and height so they know how big to build the cabinet.  The customer needs to provide both these measures to the manufacturer but if they are given one then they can find the other.  Of course the manufacturer will still check everything out as they know their customers might not put too much effort into getting these measures.  For example, the customer may have told that their new 65 inch tv was just under 60 inches wide.  Doing the calculation to find the missing leg (the height) this would come out to be just under 24 inches. To the manufacturer this is an obvious mistake because they are pretty familiar with tv sizes.  The customer failed to measure the tv precisely enough and this could turn out to be a very expensive slip up on their part.

    Collecting and Documenting Evidence of Learning


    Students will be given homework problems to work on to reinforce the material we have covered today.  These will almost completely be in the form of pictures of triangles where they can readily see what they are working with.