how many sides does a regular polygon have if the measure of one interior angle is 144
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OpenStudy (anonymous):
10
OpenStudy (anonymous):
thanks do you have the work please ?
OpenStudy (anonymous):
okay so there's this formula to help you solve for the measurement of angles in equilateral polygons it goes like this;
(n-2)*180
n stands for the number of sides so you could write it like this before solving it (n-2)*180=144
OpenStudy (anonymous):
\[\frac{ 180(n-2) }{ n }=144.\]
Solve for n
OpenStudy (anonymous):
then solve for n
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OpenStudy (anonymous):
thanks a lot
OpenStudy (anonymous):
You are welcome
OpenStudy (anonymous):
no problem!
OpenStudy (vishweshshrimali5):
Well you can also derive the formula tayromo used. Try it and you will get a great deal of improvement in geometry
OpenStudy (anonymous):
can you slove it for me im still lost my teacher never thought us anything and finals are coming up :(
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OpenStudy (vishweshshrimali5):
Its no problem
OpenStudy (vishweshshrimali5):
See the following figure:|dw:1401241866270:dw|
OpenStudy (anonymous):
yes
OpenStudy (vishweshshrimali5):
Now here is one way to approach this problem:
(1) You have to remember this property:
Sum of exterior angles in a polygon is always equal to 360 degree
OpenStudy (vishweshshrimali5):
Do you remember this one ?
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OpenStudy (anonymous):
yes
OpenStudy (vishweshshrimali5):
Gud
OpenStudy (vishweshshrimali5):
Now, let every interior angle be say x and number of sides be n.
Now, since it is a regular polygon so every interioir angle will be equal. Right ?