Math and Arithmetic

Geometry

# How many lines of symmtry does a 15 sided 2D shape have?

###### Wiki User

###### 2009-03-02 21:52:03

it is 90

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### How many lines of a trapezium?

###### Asked in Math and Arithmetic, Geometry

### What is a googolplex sided shape called?

As a inquirer of shapes and geometry. I have found that the root
terms of very many sided shapes tend to drift into the metric
system and so which causes this...
million sided shape = megagon
billion sided shape = gigagon
trillion sided shape= teragon
It continues as such but the metric system ends around "yotta"
so I don't know about an actual name for a googolplex sided
shape.
A "googolplexagon" would be my best guess.

###### Asked in Math and Arithmetic, Algebra, Geometry

### How many degrees are there in a 12 sided polygon?

To calculate this, you must find out how many triangles you can
draw into the shape. Do this by taking the total number of sides
(s) and taking away 2. This leaves you with how many triangles you
can draw in the shape (t) from one vertex to another. (Not
including outside lines!). Then, multiply the number of triangles
in the shape by 180. This leaves you with how many degrees are
inside that shape. (a)
t = s-2
a = t X 180
This means there are 1800 degrees in a 12 sided polygon.