अशाब्दिक तर्क — Counting Figures र Spatial Intelligence

यस नोटमा triangles, squares, lines count गर्ने र 3D spatial reasoning सम्बन्धी प्रश्नहरूको अभ्यास गरिन्छ।

Counting Triangles

Formula

n रेखाले बनाएको triangle मा:
Total triangles = n(n+2)(2n+1)/8 (यदि n even)
Simple approach: छोटा triangles count + combination count

Figure Small △ Medium Large Total
Basic △ (3 parts) 3 1 4
△ (4 parts) 4 3 1 8 (approx)

Counting Squares र Rectangles

Formula

m×n grid मा:
Squares = Σ (m−i+1)(n−i+1) for i=1 to min(m,n)
Rectangles = [m(m+1)/2] × [n(n+1)/2]
Example: 3×3 grid → Squares: 9+4+1 = 14

Figure Ground Perception

Complex figure भित्र simple target figure खोज्दा:
1. Target figure को sides/angles note गर्नुस्
2. Complex figure मा same proportional shape trace गर्नुस्
3. Rotation/reflection allowed हुन्छ (यदि प्रश्नले नभने)

3D Figures — Views

View नेपाली हेर्ने तरिका
Front view अगाडिबाट X-Y plane
Side view छेउबाट Y-Z plane
Top view माथिबाट X-Z plane
Quick Recall:
• 3×3 grid squares: 9+4+1 = 14
• 4×4 grid squares: 16+9+4+1 = 30
• m×n rectangles: [m(m+1)/2] × [n(n+1)/2]
• Target figure: sides count गर्नुस् → proportional trace गर्नुस्
Q1. 4×4 grid मा कति squares छन्?
(A) 16   (B) 20   (C) 30   (D) 36
→ (C) 30 → 16+9+4+1=30