9
Unit 4 — PELVIS & SPINE
LESSON 4-3 ⏱ 10 MIN
9

Number 9 — Triangles and the Pose Blueprint

Nine represents triangles. 9 = 3×3 = three triangles. In figure drawing, the triangles formed by the arms and legs capture the pose completely before any muscles are drawn.

KEY CONCEPTS

  • 9 = three triangles (3 × 3 = 9)
  • Triangle 1: negative space between the two legs (groin to knees)
  • Triangle 2: space between the right arm and the torso
  • Triangle 3: space between the left arm and the torso
  • All triangle angles sum to 180° — use this to verify pose accuracy
  • Place the three triangles FIRST — before any muscles

Before drawing a single muscle, establish three triangles. These are the negative space — the shapes of the air around the figure rather than the figure itself. When these three shapes are correctly placed, the pose is correct. The muscles simply fill in around them.

For a basic standing figure with arms at sides: the two leg triangles point downward, the two arm triangles are narrow vertical slivers. For a power stance with arms extended: all triangles are large and dynamic. For a running figure: the triangles are asymmetrical — one leg forward, one back, creating a dramatically different triangle layout that immediately reads as motion.

The math check: in any single triangle, the three interior angles always sum to exactly 180 degrees. Use this as a reality check when a limb angle looks wrong — could those three angles add to 180? If not, something needs adjustment. Triangulation is not just a drawing tool — it is a structural verification system.

TRY THIS — 10 MINUTESDraw a quick spine stroke and pelvis. Now draw three triangles only: one between the legs, one between each arm and the torso. Do NOT draw any muscles yet. Look at your three triangles alone — they already tell you exactly what pose this figure is in. The muscles just fill in around the negative spaces you've defined. This IS the 9 system at full power.

REFERENCE GALLERY

Running figures — triangle patterns in motion
Running figures — triangle patterns in motion
Sketchbook figure studies with overlays
Sketchbook figure studies with overlays
Power stance — read the triangles
Power stance — read the triangles
Triangle pose blueprints, edge geometry
Triangle pose blueprints, edge geometry
Triangle gesture shapes — pose blueprint
Triangle gesture shapes — pose blueprint
Triangle pose blueprint — 'cage of pose'
Triangle pose blueprint — 'cage of pose'
Full figure with green triangle overlay
Full figure with green triangle overlay
Triangle pose blueprint — 'cage of pose' variant
Triangle pose blueprint — 'cage of pose' variant