In message <1.5.4.32.19980815010656.00a3c738@mail.cwia.com>, john pearson writes >Sorry to be so off topic. I can't find my math books. Could you please give >me the formula for finding the area of a circle, and diameter of an area? >Thank you >John Area = PI * r^2 (PI = 3.141..., r = radius) Leon -- Leon Heller: leon@lfheller.demon.co.uk http://www.lfheller.demon.co.uk Amateur Radio Callsign G1HSM Tel: +44 (0) 118 947 1424 See http://www.lfheller.demon.co.uk/dds.htm for details of a simple AD9850 DDS system. See " "/diy_dsp.htm for a simple DIY DSP ADSP-2104 system.