Resources and Tools for Elementary Math Specialists and Teachers
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Acute Triangles with English Voice

This interactive Flash lesson gives students practice in classifying triangles and measuring angles. Despite its title, the lesson explains, compares and contrasts acute, obtuse, right, scalene, isosceles and equilateral triangles. Students are given practice using a virtual protractor to aid in the classifications. A Teacher Guide (pdf) is available [see #5 at MathActive Lessons for Grades 5-6, cataloged separately]. The lessons list also includes links to Spanish, Navajo, and non-voiced versions of this lesson.
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Contributed by: ASSET ASU - Publisher, Lorri Alonzo - Author, Sinan Yucel - Graphical designer
Math TopicGeometry, Measurement, Number Sense, Mathematical Practices, Mathematical Processes
Grade Level4, 5, 6+
Resource TypeActivity, Interactive Media, Tutorial

  • Additional Information
    • AudienceLearner
    • LanguageEnglish (USA)
    • Education Topic
    • Interdisciplinary Connection
    • Professional DevelopmentNo
    • ContributorASSET ASU - Publisher, Lorri Alonzo - Author, Sinan Yucel - Graphical designer
    • Publication Date2011
    • RightsCopyright ASSET ASU
      http://www.asset.asu.edu/new/whatisasset.html
    • AccessFree access
  • Standards
    • Common Core State Standards for Mathematics

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