geometry m1 tC
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| basic rigid motion | show 🗑
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| show | preforming multiple transformations in succession
ex : ry−axis∘R90
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| dilation | show 🗑
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| direct isometry | show 🗑
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| image | show 🗑
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| isometry | show 🗑
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| show | a transformation across a line, called the line of reflection, so that the line of reflection is the perpendicular bisector of each segment joining a point and its image
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| show | A'= (ry−axis(A))
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| opposite isometry | show 🗑
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| show | a figure before a transformation is preformed on it
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| regular polygon | show 🗑
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| show | a transformation that maps every point by rotating the plane or given angle around a fixed point called the center of rotation
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| rotation notation | show 🗑
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| show | a transformation where all the points of a figure are moved the same distance in the same direction
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| show | T a,b (A) = A'
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| show | a nontrivial rotational symmetry of a figure is a rotation of the plane that maps the figure back to itself such that the rotation is greater than 0 degrees but less than 360 degrees
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| the formula for the angle of rotational symmetry | show 🗑
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| show | P'= (-x,y)
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| what happens when you reflect a point P(x,y) over the x-axis | show 🗑
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| show | P'=(y,x)
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| show | P'= (-y,-x)
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| what happens when you reflect a point P(x,y) over the origin | show 🗑
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| How do you translate a point P(x,y) 'a' units horizontally and 'b' units vertically | show 🗑
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| show | counterclockwise
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| Negative angles are preformed in a _____________ direction | show 🗑
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