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Mathematics 22 Online
OpenStudy (anonymous):

What is the area of a regular pentagon with sides of length 13 and an apothem of length 8.95, in square units?

jimthompson5910 (jim_thompson5910):

|dw:1361849885569:dw|

jimthompson5910 (jim_thompson5910):

|dw:1361849940010:dw|

jimthompson5910 (jim_thompson5910):

|dw:1361849959838:dw|

jimthompson5910 (jim_thompson5910):

the pentagon is made up of 5 congruent triangles that look like this |dw:1361849987636:dw|

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