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6 Cards in this Set
- Front
- Back
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What is the "Golden Ratio"?
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1.168
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Formula for the median of a Trapezoid
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1/2(A+B)
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What are direct/ indirect isometry?
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Direct: The image of a figure is found by moving the figure intact within the plane.
Indirect: Cannot be performed by maintaining the orientation of points. |
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Name the different types of dilations
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-r>1: enlargement
-0<r<1: reduction -r=1: congruence transformation -ED=r(AB) -If r>0, P' lies on CP, and CP'= r x CP -If r<0, P' lies on CP' the ray opposite CP, and CP'= r x CP -P(x,y) turns to P'(rx,ry) |
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Formula for adding 2 Vectors
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a+b= (a1+b1, a2+b2)
b+a= (b1+a1, b2+a2) |
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What is a scalar?
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scalar= positive constant that changes the magnitude of a vector, but not its direction
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