TD - SOLUTION TO A TRUNCATED PENTAGONAL BASE PYRAMID (PART 1. WASSCE 🇳🇬).  

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To get the external angles of any regular polygon you make use of the formylula θ = 360°/N , where N is number of sides of the polygon and θ is the external angle. Since a pentagon has 5 sides, θ = 360°/5 = 72°.