Maths · KS3 Y7 · Geometry & Measures

Reflection symmetry

Reflection symmetryFree12:07Heddy Score 3 of 7, below the standard
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What you need to know

  • A reflection flips a shape across a mirror line without changing its size or shape.
  • Each point and its image lie the same perpendicular distance from the mirror line.
  • Reflect vertices across horizontal, vertical and diagonal lines, then join the image points.

In this clip

Runs 12:07, from 0:11 to 12:18 of the full video.

Heddy Score3/7, Below the standard
See the seven stars
  • Trusted source · passed. The creator's own upload, live and playable here.
  • On the map · not judged yet. A teacher watched it: it mainly teaches this map topic.
  • Spec-true · not judged yet. Accurate, and right for the current UK specification.
  • Focused · passed. One idea, short enough to watch in one go.
  • Accessible · passed. Good captions, clear sound and pictures.
  • Safe for children · not judged yet. Right for 11 to 16 year olds, with no sales pitch.
  • Proven · not judged yet. Earned from our students: they learn from it, find it helpful and watch it to the end.
★ passed · ☆ pending · ✕ failed
Our students

Not enough students yet

Our own students' answers. These are what move ★7 Proven.
On YouTube

320K views · 4.27K likes · 1st Class Maths 313K subscribers

As reported by YouTube on 2026-11-03. Not part of the Heddy Score.
How the Heddy Score works

Why we picked it

It gives systematic grid methods for reflecting shapes and identifying mirror lines.

1st Class Maths on YouTubechecked 2026-10-20

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