Lesson Materials

Lesson 10-2: Law of Cosines


The student will be able to solve triangles using the Law of Cosines and identify when the situation calls for the Law of Cosines.

    What Info Is Given?
  1. Click once on a color, then click inside the triangle to shade it.
      Color based on:
    • If AAA - red
    • If ASA - blue
    • If AAS - green
    • If SSS - yellow
    • If SAS - purple
    • If SSA - teal
  1. After you have colored the triangles, drag the menu in the center of the window to "Answer Key" and click the "Load Image" button to see the answer!
  2. Identifying what info is given is crucial to deciding whether to use the Law of Sines or the Law of Cosines!

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