Using only elementary geometry, determine angle x. Provide a step-by-step proof.
You may only use elementary geometry, such as the fact that the angles of a triangle add up to 180 degrees and the basic congruent triangle rules (side-angle-side, etc.). You may not use more advanced trigonomery, such as the law of sines, the law of cosines, etc. There is a review of elementary geometry below.
Grace Poli is the Media Specialist at the José Martà Middle School in Union City, New Jersey. Grace holds a B.A. in History with K-8 Certification, an M.A. in Urban Education and certificates in K-8, ESL, and Media Specialist. She is currently pursuing her Supervisors & Administrators certificates. She has worked in Union City School District as a humanities teacher, administrative intern, and media specialist since 2000.
This page (megite.com) lists a bunch of sites related to edtags.org. The list is strikingly accurate!
What is ScienceHack?
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Great tool for chemistry/physics class!
Edtags caught my eye: a sector-specific deli.cio.us. And education has plenty of web-using professionals to make it worth trying. It says it has more than 17,000 bookmarks so far, and unsurprisingly much of the content and many of the users appear to be based in North America. The developers have made it compatible with deli.cio.us, which seems sensible.
Research shows that the difference between what is taught and what is learned is often greater than most instructors realize. Lillian McDermott from the University of Washington discusses current and future trends in math and science education.
A roundup of social bookmarking tools for education--or at least how general social bookmarking tools can be used in the field of education...
This is a fun site with lots of resources to teach kids about nutrition.
RSS for user "aseldow: k-12 + teaching"
Using only elementary geometry, determine angle x. Provide a step-by-step proof. You may only use elementary geometry, such as the fact that the angles of a triangle add up to 180 degrees and the basic congruent triangle rules (side-angle-side, etc.). You may not use more advanced trigonomery, such as the law of sines, the law of cosines, etc. There is a review of elementary geometry below.
Grace Poli is the Media Specialist at the José Martà Middle School in Union City, New Jersey. Grace holds a B.A. in History with K-8 Certification, an M.A. in Urban Education and certificates in K-8, ESL, and Media Specialist. She is currently pursuing her Supervisors & Administrators certificates. She has worked in Union City School District as a humanities teacher, administrative intern, and media specialist since 2000.
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