Prelims · 8 Mental Ability · 8.14 Non-verbal reasoning

8.14.3 Counting figures: triangles, squares and lines

Count figures by a rule or by size, never by eye: squares and rectangles in a grid come from choosing lines, triangles in a fan come from choosing pairs of lines, and irregular figures are counted piece by piece — single regions, then pairs, then larger groups.

  • APPSC Group 2 · Prelims
  • Standard level
  • 7 min read
  • Full course

Key terms

  • counting figures
  • triangles
  • squares
  • rectangles
  • grid
  • chessboard
  • lines from a vertex
  • fan of lines
  • square with diagonals
  • pentagram
  • pentagon with diagonals
  • medians
  • equilateral triangle grid
  • stepped pyramid

What this note covers

  1. Core factsFoundation
  2. ExplainedStandard
  3. DeeperAdvanced
  4. Common trapsFoundation
  5. Quick revisionFoundation

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