 (12C Platinum) Circles and Spheres - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Software Libraries (/forum-10.html) +--- Forum: General Software Library (/forum-13.html) +--- Thread: (12C Platinum) Circles and Spheres (/thread-11889.html) (12C Platinum) Circles and Spheres - Gamo - 12-02-2018 10:49 AM Program solution for Circles and Spheres with givin Radius. 1. Circles solve for Circumference and Area Circumference = 2 * Pi * r Area = Pi * r^2 2. Spheres solve for Surface Area and Volume Surface Area = 4 * Pi * r^2 Volume = 4/3 * Pi * r^3 ---------------------------------------- Procedure: Input Radius [R/S] display 1111 briefly then 0.00 [RCL] 1 Answer Circle Circumference [RCL] 2 Answer Circle Area [RCL] 3 Answer Sphere Surface Area [RLC] 4 Answer Sphere Volume Example: Circle Radius = 3 3 [R/S] display "1111" 0.00 [RCL] 1 Answer 18.85 // Circle Circumference [RCL] 2 Answer 28.27 // Circle Area --------------------------------------- Sphere Radius = 3 No need to press [R/S] since same radius from previous example. [RCL] 3 Answer 113.10 // Sphere Surface Area [RCL] 4 Answer 113.10 // Sphere Volume -------------------------------------- Program: Circles and Spheres (ALG Mode) Code: ``` STO 9 355 ÷ 113 = STO 0 x 2 x RCL 9 = STO 1 ------------------------- RCL 9 X^2 x RCL 0 = STO 2 ------------------------- RCL 9 X^2 x RCL 0 x 4 = STO 3 ------------------------- RCL 9 Y^X 3 x RCL 0 x (4 ÷ 3) = STO 4 1111 PSE CLx FIX 2``` Gamo