geometry

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The points A=(1,1) B=(3,4) connects to point C (3,1).

a. Find the length of AB
b. The gradient and equation of line AB

  • geometry -

    Given: A(1,1) B(3,4), C(3,1).
    a. (AB)^2 = (3-1)^2 + (4-1)^2 = 13
    AB = sqrt13.

    b. m = (4-1) / (3-1) = 3/2.

    Y = mx + b
    1 = (3/2)*1 + b
    b = 1-3/2 = -1/2.

    Eq: Y = (3/2)x - 1/2.

  • geometry -

    Henry

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