Multiply the side length by 4 to find the perimeter. Take the side length s you just calculated and plug it into the perimeter formula, P = 4s. The result will be the perimeter of your square! 1  For the square with area 20 and side length 4.472, the perimeter P = 4 * 4.472, or 17.888.etermine the length of one side, and multiply it by 4 to find the perimeter. Depending on the assignment, you may need to measure the side with a ruler, or look at other information on the page to determine the side length.
The Thrift Savings Plan (TSP) is a government-sponsored savings and investment program that offers tax-deferred opportunities similar to the civilian sector's 401 (k) plan. Servicemembers and federal civilians have the opportunity to participate in TSP at any time.
Jupiterimages/Comstock/Getty Images. A Roth IRA and a traditional thrift savings plan (TSP) are two retirement tools used by government employees. The TSP board is planning to launch a TSP Roth in 2012 to provide more retirement options to its enrollees.