LINE REFLECTIONS Review Mrs. Erickson The Coordinate Axes x-axis y-axis Origin: (0,0) (x,y)

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Presentation transcript:

LINE REFLECTIONS Review Mrs. Erickson

The Coordinate Axes x-axis y-axis Origin: (0,0) (x,y)

The Coordinate Axes Graph, then find the area: 1.A (3,2) B (-3,2) C (-3,-2) D (3,-2) 2.A (4,1) B (1,5) C (-2,1)

The Coordinate Axes Graph, then find the area: A (3,2) B (-3,2) C (-3,-2) D (3,-2) y x A (3,2)B (-3,2) C (-3,-2) D (3,-2) 6 4 A=base x height A=6x4 A=24

The Coordinate Axes Graph, then find the area: A (4,1) B (1,5) C (-2,1) y x A (4,1) B (1,5) C (-2,1) A=½ x base x height A=½ x 6 x 4 A=12 4 6

The Coordinate Axes Solve: (x,y)  (2-x,y) 1.(0,1)  _____ 2.(-4,3)  _____ 3.(5,-1)  _____ (2,1) (6,3) (-3,-1)

Line Reflections

Lines of Symmetry

Line Reflections Draw all lines of symmetry: 1.Rectangle 2.Square 3.Equilateral Triangle

Line Reflections Draw all lines of symmetry on the following words: 1.MOM 2.DAD 3.HIKED 4.CHECK 5.RADAR 6.TOOT MOM TOOTRADAR CHECKHIKED DAD No lines of symmetry

Line Reflections Under a line reflection:  distance is preserved  angle measure is preserved  midpoint is preserved  collinearity is preserved r k = “the reflection across line k”

Line Reflections in the Coordinate Plane Reflections in the y-axis Plot: A (1,2) B (3,4) C (1,5) Under a reflection in the y-axis: (x,y)  _____ y-axis

Reflections in the x-axis Plot: A (1,2) B (3,4) C (1,5) Under a reflection in the x-axis: (x,y)  _____ Line Reflections in the Coordinate Plane x-axis

Reflections in the line y=x Plot: A (1,2) B (3,4) C (1,5) Under a reflection in the line y=x: (x,y)  _____ Line Reflections in the Coordinate Plane y=x

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