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What is a rotation? A transformation around a point/center that moves the original point a certain point to create a rotated point.
What the rule for rotating a figure 90 degrees? (x,y) --> (-y,x)
(x,y) --> (-x,-y) What degree did i rotate by? 180 degrees
Whats another word for isometry? Reflection
How do you reflect a figure across the x-axis? (x,y) ----> (x,-y)
Whats the rule for reflection across the y=x ? (x.y)---> (y,x)
What is a point? Named a location and has no size.
How do you label a line? lowercase cursive letter or two points on a line
What is a vertex? Intersection of 2 or more lines, segments or rays.
How do you label a plane? 3 points on the plane or capital cusive letter.
What is a segment? A part of a line containing 2 points and all points inbetween.
How can you locate an endpoint? Just look for a capital letter.
What is a ray? Starts an an endpoint and extends forever in one direction
Whats the difference between a ray and an opposite ray? A ray is one line that extends forever, while an opposite ray is two rays that have a common endpoint.
What does collinear mean? Points that lie on the same line.
What does coplanar mean? Points that lie on the same plane.
How do you reflect a shape across the y-axis? (x,y) --> (-x,y)
How do you translate an image? Along a vector.
Whats the rule for translating along a vector? (x,y) ---> (x+a,y+b)
What is a line? A straight path with no thickness and extends forever.
What is line symmetry? When a figure can be reflected across a line so the images match up
What is line of symmetry? Divides the figure into two congruent halves.
What is rotational symmetry? If a figure can be rotated around a point by an angle betwwen zero and 360 degrees
What is plane symmetry? A 3-D figure can be cut by a plane and will create two equal figures.
What is symmetry about an axis? If a 3-D figure can be rotated around a line and the shape doesn't change.
Created by: SoccerSwagg