Maths · KS3 Y9 · Geometry & Measures

Surface area of cylinders

Surface area of cylindersFree5:07Heddy Score 3 of 7, below the standard
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What you need to know

  • A cylinder’s surface area is the area of its two circular ends plus the curved rectangular surface.
  • Use 2πr² + 2πrh, where the rectangle’s length is the circle’s circumference, and give the answer in square units.

In this clip

Runs 5:07, from 0:05 to 5:12 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

1.25M views · 11.2K likes · Math with Mr. J 2.03M subscribers

As reported by YouTube on 2026-11-02. Not part of the Heddy Score.
How the Heddy Score works

Why we picked it

The net helps students see how the two circles and curved surface form the total area.

Math with Mr. J on YouTubechecked 2026-10-20

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