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marcoduuuh

  • one year ago

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

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  1. jim_thompson5910
    • one year ago
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    |dw:1361849885569:dw|

  2. jim_thompson5910
    • one year ago
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    |dw:1361849940010:dw|

  3. jim_thompson5910
    • one year ago
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    |dw:1361849959838:dw|

  4. jim_thompson5910
    • one year ago
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    the pentagon is made up of 5 congruent triangles that look like this |dw:1361849987636:dw|

  5. jim_thompson5910
    • one year ago
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    find the area of one of the triangles then multiply that result by 5 to get the area of the pentagon

  6. marcoduuuh
    • one year ago
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    Do I use 1/2bh?

  7. marcoduuuh
    • one year ago
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    If I do, would it be 1/2(13)(17.9)?

  8. jim_thompson5910
    • one year ago
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    yes, but it would be (1/2)*(13)*(8.95)

  9. marcoduuuh
    • one year ago
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    58.175. 58.175*5=290.875?

  10. jim_thompson5910
    • one year ago
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    very good

  11. marcoduuuh
    • one year ago
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    Thank you for the help!

  12. jim_thompson5910
    • one year ago
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    yw

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