Post Summarisation: 1. Definition of Involute 2. Use of Involute 3. Involute of a Circle 4. Involute of a Triangle 5. Involute of a Square 6. Involute of a Pentagon 5. Involute of a Semi Circle 6. Involute of a Pole 7. Tangent and Normal on an Involute 1. Definition: What is an Involute? When a curve traced by the end point on a straight line which rolls out without any slipping along from a circle or a polygon, such curve is called as an Involute. For simplicity, it is a curve generated by an end of a piece of thread, from roll tight around a circle or a polygon to unwound condition . Mathematically, it can be described by x = rcos8 + r8sin8 , y = rsin8 - r8cos8 , where, " r " is the radius of a circle . 2. Use of Involute: Practically, Involutes are generally used in drawing of Belt Drive, Chain Drive, Teeth Profile of a Gear , etc. 3. How to Draw an Involute of a Given Circle? Construction: (i) Draw a Circl...