← Pattern Anatomy

Pattern Anatomy

Each pattern, deconstructed.

coordinate-figure-computation

★ Rank 3/22 10.4% of all AMC problems Grade 6–6

A polygon or other figure is given by coordinates; the task is to compute an unknown coordinate, length, or area. The structural move is reading off horizontal/vertical distances directly from coordinate differences, then applying a one-line geometric formula (base × height / 2, etc).

Drill 1020 variants available
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Sample problem
no figure
amc8-2024-11
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27-year frequency
1999–2026 ↑ 57%
2026 forecast slots
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How to solve

Primary tools see-drawmath-tools
What to look for
  • Keep base axis-aligned but rotate the apex location (e.g. unknown x instead of unknown y) — symmetric variant
  • Change figure_type to parallelogram so base × height is still the formula
  • For a harder variant, tilt the base so the height must be derived from the perpendicular distance formula

Sub-archetype mix (6)

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More data (year-over-year, tool fingerprint, grade distribution, all members)
188
members
1999–2026
Active years
Year-over-year

Tool fingerprint (1–17)

Grade distribution

  • Gr 5
    2
  • Gr 6
    25
  • Gr 7
    22
  • Gr 8
    138