99 Club Studio v1.22.2 — Angles visual polish + Pie Chart variety

Release date: 11 September 2026

This release is intended to apply directly over v1.21.3. The withdrawn/internal v1.22 and v1.22.1 Angles packages are not prerequisites.

Angles & Turns

  • Adds the reliability-reviewed Angles Stage 1 module to Custom Worksheets: 104 active subtypes / 416 deterministic entries across Y1–Y6.
  • Holds back six unresolved research archetypes rather than shipping ambiguous geometry.
  • Adds protected angle-diagram footprint space so page packing does not shrink geometry excessively.
  • Reworks turn diagrams so START/END are attached to the actual rays; removes the detached colour-key caption.
  • Increases label clearance on angle arcs and crowded line/point scenes.
  • Enlarges triangle/shape drawing envelopes and uses more conservative label positions.
  • Rebuilds the protractor with 1° minor ticks, 5° intermediate ticks, 10° major ticks and dual scales.
  • Protractor questions receive an extra protected print footprint.

Pie Chart variety

  • Expands Pie Charts from 4 to 16 deterministic visual variants per subtype.
  • The 37 pie-chart subtypes therefore expose 592 deterministic pool entries.
  • Adds 3–6-sector structural archetypes including balanced, dominant, equal-pair and long-tail distributions.
  • Varies sector order, start rotation, colour offset, internal-label usage and bottom/right legend placement.
  • Adds anti-repetition visual signatures so adjacent selected questions are less likely to use the same chart silhouette/layout.
  • Uses dedicated integer-angle/friendly-percentage data banks for construction and angle-table tasks.

Marking / working-space contract retained

  • Visual estimation is explicit single-best-answer MCQ rather than undefined fuzzy-range marking.
  • Genuine physical angle measurement/construction uses an explicit ±2° teacher tolerance.
  • Explain/justify/show-working questions reserve framed pupil response space.
  • Reasoning questions use explicit teacher rubrics with required mathematical criteria and accepted equivalents.

Graph convention retained

  • Bar/time/line graph y-axis titles remain vertically oriented and centred beside the left axis.

Compatibility

The public 99 Club page, public Help, compact QR/recreation system, core generator.js, standard pdf-layout.js, simple-pdf.js, qr-lite.js and 99club.css are unchanged from v1.21.3.