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samm2121

  • 2 years ago

How are the coordinates of the new point found if it is dilated with a scale factor of 3?

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  1. seashell
    • 2 years ago
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    ) Here θ = 270; so, cos(270) = 0 and sin(270) = -1 Thus, (x₁,y₁) = (x*0-y*-1, x*-1+y*0) = (y,-x) [It is equivalent to 90 deg rotation in clockwise]

  2. samm2121
    • 2 years ago
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    thanks heres a few more im just so bad at math How are the coordinates of the new point found if it is rotated 90° counterclockwise? How many degrees is that equivalent to if the rotation is clockwise?

  3. yakeyglee
    • 2 years ago
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    I don't quite understand @seashell 's reasoning. What I believe one should do is find the angle of the point to the \(x\)-axis, and then find the point that is three times the distance away form the origin as the original point.

  4. seashell
    • 2 years ago
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    :p well then ;)

  5. yakeyglee
    • 2 years ago
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    Dilation means to stretch outward...it's not a rotation.

  6. seashell
    • 2 years ago
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    :p i gave you a medal ALRIGHT!;)

  7. yakeyglee
    • 2 years ago
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    Haha I know. ;-) Just clarifying.

  8. seashell
    • 2 years ago
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    :D

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