The Area of All Triangles Using Height and Base

Drop in the altitude is all that is needed. Pupils explore finding areas of different types of triangles. Learners realize the formula for finding their area is the same and explore the location of altitudes in triangles to finish the fourth segment in a 22-part unit.

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CCSS: Designed
Instructional Ideas

  • Make connections to parallelograms not just rectangles
  • Have learners mark the altitude in each triangle
Classroom Considerations

  • Requires scissors, glue, and rulers
Pros

  • Contains and exit ticket to check for understanding
  • Includes anticipated answers to discussion questions
Cons

  • None
Common Core