ΔEFD consists of three sides, EF, FD, and ED.

  1. Observe how sides FD and EF are moved into a straight row. Side ED is moved below the line segment created.
  2. Sides ED and DF are moved into a straight row. Side EF is moved below the line segment created.
  3. Sides EF and ED are moved into a straight row. Side DF is moved below the line segment created.

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Interactive popup. Assistance may be required. Check Your Answer Triangle Inequality Property: The sum of the lengths of any two sides of a triangle is greater than the length of the third side. Close Pop Up