Q1
What is the reflection of (3,4) across the x-axis?
A(3,-4)
B(-3,4)
C(4,3)
D(-3,-4)
ICSEClass 10 (ICSE)MathematicsCh 12 · Topic 2
Practice and Revision - Reflection
Let us practise and revise what we learned about reflection. Reflection in coordinate geometry involves finding the mirror image of a point
Core concept
Reflecting a point (x,y) across the x-axis gives (x,-y), while reflecting across the y-axis gives (-x,y).
How it works
Reflecting a point across the line y=x swaps the coordinates, giving (y,x) as the reflected point.
Why it matters
When reflecting a shape, each point of the shape is reflected individually, maintaining the shape's size and form but reversing orientation.
Key detail
Understanding reflection helps us solve coordinate geometry problems and is fundamental to concepts like symmetry and transformations.
Exam highlight
Key diagram
Keywords worth remembering
Trending
reflectionicse class 10
Most searched
ICSE class 10 reflection
Quick revision
Study resources
Notes & downloads
Quick notes
• Reflecting (x,y) across x-axis gives (x,-y).
• Reflecting across y-axis gives (-x,y).
• Reflecting across y=x gives (y,x).
• Shape reflection reflects each point individually.
• Size and form stay the same; orientation reverses.
• Reflection is a type of transformation.
• It's fundamental for symmetry concepts.
• Practice builds coordinate geometry skills.