Circles in Triangles

Circles, and triangles, and tangents, oh my! In the assessment task, learners first answer questions leading to the radius of an inscribed circle for a given right triangle. They then use the result to independently determine the radius of an inscribed circle for a different right triangle.

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CCSS: Designed
Instructional Ideas

  • Use the resource as an in-class activity
Classroom Considerations

  • Learners need to be aware of the hypotenuse-leg condition for congruent triangles
  • Cass should have some experience with tangent lines to circles

  • Scaffolding provides all learners the means to access solution
  • Resource includes an answer key with rubric

  • Diagram is haphazardly drawn