Regular Polygons are just what they sound like. Polygons that are not bent or shaped weird. An example of a regular polygon would be the pentagon or a triangle. To find the area of these shapes you need the formula
A=nas/(1/2)
Which can be subtitused for A=pa
A is the are
n is the number of sides a shape has
a is the apothem, which is basically the radius of the shape (it is not for circles, so don't get it confused)
s is the length of the sides.
So let's say if you have a pentagon with an Apothem of 8, and side length of 7 you would set it up like so:
A=5*8*7/2 the result would be 140!
When you have the area but not one of the other variables, you must do the inverse operation.
A=nas/(1/2)
Which can be subtitused for A=pa
A is the are
n is the number of sides a shape has
a is the apothem, which is basically the radius of the shape (it is not for circles, so don't get it confused)
s is the length of the sides.
So let's say if you have a pentagon with an Apothem of 8, and side length of 7 you would set it up like so:
A=5*8*7/2 the result would be 140!
When you have the area but not one of the other variables, you must do the inverse operation.
No comments:
Post a Comment