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Derivation of the Triangle Area Formula

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.
  • Read
    Area of a Triangle

    Area of a Triangle

    by Bill Worley //at grade

    This lesson covers how to find the area of a triangle using sine.

  • Study Guide
    Triangle Formulas

    Triangle Formulas

    by Rayna Schlossberg //at grade

    Determine an alternate formula for the area of a triangle, find the area of a triangle when three sides are known, and find unknown triangle quantities when given area.

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