3.4.1
Reflection & Translation
Reflection
Reflection
Reflection is when you reflect a shape in a mirror line.
,h_400,q_80,w_640.png)
,h_400,q_80,w_640.png)
Reflection
Reflection
- A reflection is when a shape is reflected by a mirror line.
- A reflection is usually done on a grid.
- A dotted line shows the mirror line.
,h_400,q_80,w_640.png)
,h_400,q_80,w_640.png)
Distance from the mirror line
Distance from the mirror line
- To reflect a shape onto the other side of the mirror line, it is important to notice how far away from the mirror line each point is.
,h_400,q_80,w_640.png)
,h_400,q_80,w_640.png)
Point A
Point A
- Point A is 2 squares from the mirror line.
- When it is reflected, point A will be 2 squares away from the mirror line on the other side of the mirror line.
- The new point A will be at the same level as the original point A.
,h_400,q_80,w_640.png)
,h_400,q_80,w_640.png)
Point B
Point B
- Point B is 2 squares from the mirror line.
- When it is reflected, point B will be 2 squares away from the mirror line on the other side of the mirror line.
- The new point B will be at the same level as the original point B.
,h_400,q_80,w_640.png)
,h_400,q_80,w_640.png)
Point C
Point C
- Point C is 4 squares from the mirror line.
- When it is reflected, point C will be 4 squares away from the mirror line on the other side of the mirror line.
- The new point C will be at the same level as the original point C.
,h_400,q_80,w_640.png)
,h_400,q_80,w_640.png)
Point D
Point D
- Point D is 4 squares from the mirror line.
- When it is reflected, point D will be 4 squares away from the mirror line on the other side of the mirror line.
- The new point D will be at the same level as the original point D.
,h_400,q_80,w_640.png)
,h_400,q_80,w_640.png)
Finish the shape
Finish the shape
- You can complete the shape now that you have reflected all of the points of your shape in the mirror line.
- Complete the shape by joining the dots.
Translation
Translation
Translation is moving a shape from one position to another. The shape does NOT change size or turn.
,h_400,q_80,w_640.png)
,h_400,q_80,w_640.png)
Translation
Translation
- The red rectangle has been translated to the blue rectangle.
- The red rectangle has moved but has NOT changed size or turned.
,h_400,q_80,w_640.png)
,h_400,q_80,w_640.png)
Tracking points of the rectangle
Tracking points of the rectangle
- You can see how the rectangle has been translated by choosing a point to track.
- Point A is shown on both rectangles.
,h_400,q_80,w_640.png)
,h_400,q_80,w_640.png)
Tracking points
Tracking points
- If you count how many squares A has moved from the red rectangle to the blue rectangle, you will see:
- A has moved 4 squares to the right.
- A has moved 3 squares down.
1Year 5 - Number
1.1Number & Place Value
1.2Addition & Subtraction
1.3Multiplication & Division
2Year 5 - Measurement
2.2Perimeter & Area
2.3Time
3Year 5 - Geometry
3.1Properties of 3D Shapes
3.2Properties of 2D Shapes
3.4Position & Direction
4Year 5 - Statistics
5Year 6 - Number
5.1Number & Place Value
5.2Multiplication & Division
5.3Mental Maths
5.4Order of Operations
5.5Problem Solving
5.6Fractions & Decimals
6Year 6 - Ratio & Proportion
6.2Percentages
6.3Scale
7Year 6 - Algebra
7.2Missing Number Problems
8Year 6 - Measurement
8.1Problem Solving
8.2Unit Conversion
8.3Perimeter, Area & Volume
8.4Angles
8.5Circles
8.6Coordinate Grids
9Year 6 - Statistics
9.1Displaying Data
9.2Averages
Jump to other topics
1Year 5 - Number
1.1Number & Place Value
1.2Addition & Subtraction
1.3Multiplication & Division
2Year 5 - Measurement
2.2Perimeter & Area
2.3Time
3Year 5 - Geometry
3.1Properties of 3D Shapes
3.2Properties of 2D Shapes
3.4Position & Direction
4Year 5 - Statistics
5Year 6 - Number
5.1Number & Place Value
5.2Multiplication & Division
5.3Mental Maths
5.4Order of Operations
5.5Problem Solving
5.6Fractions & Decimals
6Year 6 - Ratio & Proportion
6.2Percentages
6.3Scale
7Year 6 - Algebra
7.2Missing Number Problems
8Year 6 - Measurement
8.1Problem Solving
8.2Unit Conversion
8.3Perimeter, Area & Volume
8.4Angles
8.5Circles
8.6Coordinate Grids
9Year 6 - Statistics
9.1Displaying Data
9.2Averages
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