MATHS - Geometry - Transformations Reflections

This video tutorial explains the concept of reflections in mathematics, focusing on the use of mirror lines, also known as axes of reflection. It covers how to reflect shapes by counting squares and ensuring that reflections are perpendicular to the mirror line. The tutorial also addresses reflecting shapes with diagonal mirror lines and provides tips for visualizing perpendicularity. Additionally, it discusses how to handle overlapping shapes and includes practice questions to reinforce learning. The key rules for reflections are maintaining perpendicularity to the mirror line and ensuring equal distance from it.

What is the term used for the line across which a shape is reflected?

• Reflection axis

• Line of symmetry

• Mirror line

• Axis of symmetry

When reflecting a shape, how should the distances be measured in relation to the mirror line?

• At any angle to the mirror line

• Parallel to the mirror line

• Perpendicular to the mirror line

• Horizontally to the mirror line

What should you do if you find it difficult to visualize the perpendicularity of a shape to a diagonal mirror line?

• Ignore the diagonal line

• Draw a new mirror line

• Rotate the page to make the mirror line vertical

• Use a ruler to measure

How do you reflect a point that is 1 and 1/2 squares away from the mirror line?

• Move it 2 squares away on the other side

• Move it 1 and 1/2 squares away on the other side

• Move it 3 squares away on the other side

• Move it 1 square away on the other side

What is the key rule when reflecting a shape that overlaps the mirror line?

• Reflect the entire shape without counting

• Reflect only the part that overlaps

• Count squares to the mirror line and reflect across

• Ignore the overlapping part