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Mathematics 28 Online
OpenStudy (anonymous):

hi. can you explain this to me? a = (s/2) x cot(180/n) (area of a regular polygon)

OpenStudy (jack1):

a = (s/2) x cot(180/n) (area of a regular polygon) Area = a Side length = s n = number of sides cot = cot (cotangent)

OpenStudy (anonymous):

okay. and how to derive that? =)

OpenStudy (jack1):

|dw:1385382629539:dw|

OpenStudy (jack1):

using triangles

OpenStudy (jack1):

|dw:1385382707151:dw|

OpenStudy (jack1):

|dw:1385382750648:dw| |dw:1385382824158:dw|

OpenStudy (jack1):

|dw:1385382907276:dw| |dw:1385382996929:dw| with me so far?

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