Geometry, Help

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Help? I'm stuck.

For each graph, find (a)AB to the nearest tenth and (b)the coordinates of the midpoint of AB.

1. Coordinates are A(-9, -6) B(6,6)

2.A(-2,-2) B(8,-6)

3. A(0,3) B(-2,-2)

  • Geometry, Help -

    just use the distance formula: d = √(∆x^2 + ∆y^2)

    for #2, that would be
    d = √((8-(-2))^2 + (-6-(-2))^2)
    = √(10^2 + (-4)^2)
    = √116
    = 2√29

  • Geometry, Help -

    would you divide 2 by 29?

  • Geometry, Help -

    Is #1 184.2?

  • Geometry, Help -

    #1 is √(225+144) = √369 = 19.2

  • Geometry, Help -

    for #2 the midpoint is (3,-4)
    That is the average of the endpoints

  • Geometry, Help -

    I got 369 and divided by 2. How's you get that answer?

  • Geometry, Help -

    SORRY! I was squaring it. Thanks for your help.

  • Geometry, Help -

    is one's midpoint answer (-1.5,-6)?

  • Geometry, Help -

    No, it's (-1.5,0) !!

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