angles in a pentagon?

Question

I have to build a polyhedron for my geomtry class, all the lenghts and angles have to be correct, so i was wondering do all the angles inside a pentagon add up to somthing, if so what? If you don't know what i'm talking, i'm talking about how on triangles if you add all the angles together you get 180 and with sqaures you get 360.

Thank you in advance for your help!

Answer 1

sum of interior angles =540
Sum of exterior angles = 360

Each interior angle = 108
Each exterior angle = 72

Answer 2

Angles In A Pentagon

Answer 3

The sum of all the five angles of a pentagon is 2X5-4 or 6 right angles or 540 degrees.As a pentagon has 5 sides and hence 5 angles,a regular pentagon(by regular pentagon,we mean a pentgon whose sides are equal) will have each of its angles measuring 540/5=106 degrees.

Answer 4

The sum of the interior angles of a pentagon = 540 degrees but the sum of the exterior angles = 360 degrees.

Answer 5

to find the total angle measure of any polygon divide it into as few triangles as possible and add up their measures. a pentagon can be divided into three triangles so it's total measure is 540degrees. 540 divided by 5 angles is 108 degrees to each angle in a 'regular' pentagon

Answer 6

Check out the below site for information on pentagons. Each angle is 108 degrees.

http://www.jimloy.com/geometry/pentagon.htm

Answer 7

Build a truncated icosahedron (the shape of a soccer ball). I once did. It's made up of pentagons and hexigons. It's a lot of work, but worth the effort.

There's a picture of one on this site
http://www.oceansiderevolution.com/EINSTEIN_1.htm

Answer 8

i am not dumb but i don't know

Answer 9

360! Please pick me for the best answer................