👉🏻 3-4-5 Method | Site-এ Right Angle নিশ্চিত করার সহজ কৌশল 📐🏗️ এটি construction ও civil engineering-এ ব্যবহৃত একটি fundamental technique, যার মাধ্যমে site-এ খুব সহজে ও নির্ভুলভাবে 90° (right angle) তৈরি করা যায়। এই পদ্ধতিটি পুরোপুরি Pythagorean Theorem-এর উপর ভিত্তি করে কাজ করে এবং structure-এর alignment ও squareness নিশ্চিত করে—যা stability ও precision-এর জন্য অত্যন্ত গুরুত্বপূর্ণ। 🔹 3-4-5 Method কীভাবে প্রয়োগ করবেন? 1️⃣ Measure (প্রথম দিক): একটি starting point থেকে baseline বরাবর 3 unit (
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