# Math Help - Polygon Formulas

1. ## Polygon Formulas

Hello,
I have a list of seven formulas to learn, but am stumped by three of them. Would someone kindly tell me what they are the formulas for?

(n-2) 180/n = angle

(n-2) 180/angle = n

360/angle = n

Thank you!

2. Hello

(n-2) 180/n = interior angle
The interior angle of a regular polygon with n sides

(n-2) 180/angle = n
Rearrangement of the first one.

360/exterior angle = n
The number of sides, n, of a regular polygon, given exterior angle.

$\frac{360}{n} = exterior\ angle$

Exterior angle of a regular polygon with n sides.

3. Thank you SO much, Ting!