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Unit 3

Geo

QuestionAnswer
Basic Rigid Motion Transformations that preserve lengths of segments and measures of angles
Image The figure that has undergone the transformation
Opposite isometry an isometry that changes orientation
Regular polygon A polygon with all sides of equal length and all interior angles of equal measure. It is equilateral and equiangular
Pre image A figure before a transformation is performed on it
To reflect a point P(x,y) over the y-axis (-x,y)
To reflect a point P(x,y) over the x-axis (x,-y)
To reflect a point P(x,y) over the line y=x (y,x)
To reflect a point P(x,y) over the line y=-x (-y,-x)
To reflect a point P(x,y) over the origin (-x,-y)
To translate a point P(x,y) a units horizontally and b units vertically (x+a,y+b)
The formula for the angle of rotational symmetry 360 ---------- # of_sides of_a_regular polygon
To perform a rotation we need a center of rotation a direction and an angle of rotation. We will be performing rotations on the coordinate plane where the center of rotation is the origin A positive angle will be counterclockwise while a negative annle will be clockwise
Created by: user-2059670
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