Results 1 to 2 of 2

Math Help - solving a triangle >.<

  1. #1
    Newbie
    Joined
    Jan 2010
    Posts
    10

    solving a triangle >.<

    1.A regular pentagon is inscribed in a circle whose radius 18cm. Find the perimeter of the pentagon.

    2.Find the radius of the circle circumscribed about the triangle for which A=50deg. B=15deg a=70cm
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Newbie
    Joined
    Feb 2010
    From
    Fairfield, Ca
    Posts
    21
     <br />
\frac{360}{5} = 72^{\circ} \therefore \angle O = 72^{\circ}<br />

    find the missing side using the law of cosine and you'll find the perimeter
    Attached Thumbnails Attached Thumbnails solving a triangle &gt;.&lt;-pentagon.jpg  
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Help with solving this triangle!
    Posted in the Geometry Forum
    Replies: 2
    Last Post: May 24th 2011, 05:36 AM
  2. Solving right triangle
    Posted in the Trigonometry Forum
    Replies: 3
    Last Post: September 20th 2009, 05:44 PM
  3. How to go about solving this triangle.
    Posted in the Trigonometry Forum
    Replies: 5
    Last Post: September 4th 2009, 10:38 AM
  4. Solving the triangle
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: February 11th 2009, 03:09 PM
  5. Solving a triangle with only 2 sides?
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: January 10th 2009, 06:05 AM

Search Tags


/mathhelpforum @mathhelpforum