Maths · GCSE · Geometry & Measures

Loci

gcse-math-g2cFree1:36Heddy Score 2 of 7, below the standard

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What you need to know

A locus is the set of points that follow a rule.
Points a fixed distance from a point form a circle.
Points equidistant from two points lie on the perpendicular bisector.

In this clip

8:33–9:37Rearranging simple formulaem71

9:37–12:43Solving linear inequalitiesm73

14:00–15:57Averages from frequency tablesm171

17:06–18:06Constructing bisectorsm135

18:06–20:36Linear graphs y = mx + cm17

21:35–23:22Area of a circlem127

26:01–26:58Reverse percentagesm52

26:58–28:18Laws of indicesm41

30:48–32:24Inverse proportionm103

32:24–34:21Speed, distance, timem96

34:21–35:52Scatter graphs & correlationm20

37:34–38:52Pythagoras: the hypotenusem136

40:11–42:28Column vectorsmh15

46:09–48:15Venn diagrams for probabilitym157

55:24–57:38Simultaneous equationsm19

61:55–63:41Compound interestmh12

63:41–66:11Trigonometry first stepsmh2

68:28–70:43Graphs of quadraticsm85

70:43–72:19Locigcse-math-g2c

72:19–74:29HCF & LCM by prime factorsm54

74:29–76:18Volume of pyramids, cones and spheresgcse-math-g17b

83:26–84:53Tree diagramsmh17

91:35–94:32Density and pressuregcse-math-r11b

112:22–113:53Negative scale factorsgcse-math-g7c

159:44–163:10Histogramsgcse-math-s3a

169:09–171:56Algebraic proofgcse-math-a6c

173:39–176:10Similar shapes: areas and volumesgcse-math-g19b

193:10–194:55Turning points by completing the squaregcse-math-a11c

203:02–206:42Tangent to a circlegcse-math-a16b

210:10–213:40Iterationgcse-math-a20

Also coversCalculator fluencym44

Also coversEstimating before calculatingm32

Also coversFrequency polygonsmh19

Also coversCalculating in standard formm48

Also coversParallel lines on graphsm79

Also coversSurface area of pyramids, cones and spheresgcse-math-g17c

Also coversExponential graphsgcse-math-a12c

Also coversAlgebraic fractionsgcse-math-a4g

Also coversArea under a graphgcse-math-a15b

Also coversGeometric proofgcse-math-g6

Also coversVector proofsgcse-math-g25b

Also coversTransforming graphsgcse-math-a13

Heddy Score2/7, Below the standard

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 · not judged yet. 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.

How the Heddy Score works

Why we picked it

1st Class Maths' long Higher revision video working through a question booklet; many chapters are only links, so the timed set keeps the clearly titled ones.

1st Class Maths on YouTubechecked 2026-10-16