Using the Pythagorean Theorem. 1  1. Learn the Pythagorean Theorem. 2  2. Make sure that your triangle is a right triangle. 3  3. Assign variables a, b, and c to the sides of your triangle.  4. Find the squares of a and 1  b. 5. Add together the values of a2 and 2  b2. 6. Find the square root of  c2.
A custodial fee is simply a flat fee charged by a bank or brokerage for administering or managing an IRA. Virtually every type of IRA is associated with some type of custodial fee, regardless of whether you choose a certificate of deposit, a mutual fund or some other type of IRA.
Typical rules for Roth IRAs. To be eligible to open a custodial Roth IRA, the child must meet all the same requirements as an adult would. The minor must have earned income, and contributions are limited to the lesser of total earned income for the year and the current maximum set by law, which for 2015 and 2016 is $5,500.