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7-80.

On graph paper, plot the points and . 7-80 HW eTool (Desmos) Homework Help ✎

  1. Calculate (the length of ).

    Use the Pythagorean Theorem to find the length of .

  2. Locate the midpoint of and label it point . What are the coordinates of point ?

    Use two congruent slope triangles to find the midpoint.

  3. Calculate . Can you do this without using the Pythagorean Theorem?

    Because is the midpoint, what does that tell you about the length of ?

Use the hints in the eTool below for parts (a-c).
Click on the link at right for the full eTool version: INT1 7-80 HW eTool