Mathematics Geometry Procedural 9–10 yrs

Transformations on a Grid

网格上的图形变换

Description

Identify, describe, and represent the position of a shape following a reflection or translation using appropriate language; know that the shape has not changed

Mastery Evidence

✓ Reflect a triangle in a vertical mirror line on a coordinate grid and state the new coordinates
✓ Translate a shape 3 units right and 2 units up and describe the movement
✓ Explain that a reflected/translated shape is congruent to the original

Assessment Prompt

If your child slides or flips a shape on squared paper, can they describe exactly where it ends up and confirm the shape itself hasn't changed size or angles?