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10 cards from this deck
Distance, area, and gradient
AD = MD × S (Actual = Map × Scale)
1:50,000 (1 cm = 0.5 km)
1:10,000 (1 cm = 0.1 km)
Straight is direct; actual follows path curves
A = L × B (Area = Length × Breadth)
G = H/D (Gradient = Height/Distance)
As a ratio (e.g., 1:20)
Square kilometres (km²) or square metres (m²)
Multiply map distance by 0.5
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