By failing to prepare, you are preparing to fail.
E2017-04-02T20:11:09+10:00

## E

##### Definition
effective rate of interest compares a reducible rate to a flat rate of interest $E=\frac{(1+r)^n-1}{n}$ where: E = effective flat rate, r = reducible rate as a decimal, n = length of loanWhen comparing a flat rate then we use this formula to approximate the effective interest: $r=\frac{2nR}{n+1}$ where: r = effective rate, n = length of loan, R = flat rate of interest
exterior angle sum the exterior angle sum of any polygon is 360°