Sponsored Links
This presentation is the property of its rightful owner.
1 / 15

# Line Reflections PowerPoint PPT Presentation

Line Reflections. Review. Mrs. Erickson. The Coordinate Axes. y-axis. (x,y). Origin: (0,0). x -axis. The Coordinate Axes. Graph, then find the area: A (3,2 ) B (- 3,2) C (- 3,-2) D ( 3,-2 ) A (4,1 ) B ( 1,5) C (- 2,1). The Coordinate Axes. y.

### Download Presentation

Line Reflections

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

## Line Reflections

Review

Mrs. Erickson

y-axis

(x,y)

Origin: (0,0)

x-axis

### The Coordinate Axes

Graph, then find the area:

• A (3,2) B (-3,2) C (-3,-2) D (3,-2)

• A (4,1) B (1,5) C (-2,1)

### The Coordinate Axes

y

Graph, then find the area:

A (3,2)

B (-3,2)

C (-3,-2)

D (3,-2)

B (-3,2)

A (3,2)

x

4

6

A=base x height

C (-3,-2)

D (3,-2)

A=6x4

A=24

### The Coordinate Axes

y

B (1,5)

Graph, then find the area:

A (4,1)

B (1,5)

C (-2,1)

4

6

C (-2,1)

A (4,1)

x

A=½ x base x height

A=½ x 6 x 4

A=12

### The Coordinate Axes

Solve: (x,y)  (2-x,y)

• (0,1)  _____

• (-4,3)  _____

• (5,-1)  _____

(2,1)

(6,3)

(-3,-1)

### Line Reflections

Lines of Symmetry

### Line Reflections

Draw all lines of symmetry:

• Rectangle

• Square

• Equilateral Triangle

### Line Reflections

Draw all lines of symmetry on the following words:

• MOM

• DAD

• HIKED

• CHECK

• RADAR

• TOOT

DAD

MOM

No lines of symmetry

HIKED

CHECK

RADAR

TOOT

No lines of symmetry

### Line Reflections

Under a line reflection:

• distance is preserved

• angle measure is preserved

• midpoint is preserved

• collinearity is preserved

rk= “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

### Line Reflections in the Coordinate Plane

Reflections in the x-axis

Plot:

A (1,2)

B (3,4)

C (1,5)

Under a reflection

in the x-axis:

(x,y)  _____

x-axis

### Line Reflections in the Coordinate Plane

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)  _____

y=x

… just kidding