Teacher resources and professional development across the curriculum

Teacher professional development and classroom resources across the curriculum

Monthly Update sign up
Mailing List signup
Learning Math Home
Geometry Session 2: Notes
Session 2 Part A Part B Part C Homework
Algebra Site Map
Session 2 Materials:

A B C 


Notes for Session 2, Part B

Note 3

For a hands-on version of this Interactive Activity, use linkage strips (or make your own strips) to answer Problems B1-B5.

<< back to Part B: Linkage-Strip Constructions


Note 4

If you are working in groups to construct triangles and then, in Problem B6, quadrilaterals, discuss the rules you came up with for instances in which three lengths make a triangle and in which four lengths make a quadrilateral.

Sometimes people may be confused about the question of whether or not you can "deform" one triangle into anther one. It helps to build another figure -- use five sides so as not to give away the answers for the quadrilaterals in Problem B6 -- and see how easy it is to push on the sides and angles to form many different pentagons with the same five sides. Then, although the materials may allow a little bit of "wiggle," it becomes clear whether or not you can deform a triangle into a completely different one.

<< back to Part B: Linkage-Strip Constructions


Learning Math Home | Geometry Home | Glossary | Map | ©

Session 2 | Notes | Solutions | Video


© Annenberg Foundation 2017. All rights reserved. Legal Policy