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#1 2006-12-14 06:28:35

unique
Member
Registered: 2006-10-04
Posts: 419

Traingle

Solve the triangle below for angle x and then compute the area of the triangle.

         *
        * *
       *    *
      *       *
3in *          *  5in
    *             *
   *                *
  *                   *
*                      *
* 75dg           xdg *
*****************


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#2 2006-12-14 07:18:53

luca-deltodesco
Member
Registered: 2006-05-05
Posts: 1,470

Re: Traingle

use the sine rule:

i.e.



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#3 2006-12-14 08:48:12

unique
Member
Registered: 2006-10-04
Posts: 419

Re: Traingle

sinx = 2.897777479 / 5
sinx = 0.579555495
so
x = sin 0.579555495
x = 0.010114979


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#4 2006-12-14 09:12:09

luca-deltodesco
Member
Registered: 2006-05-05
Posts: 1,470

Re: Traingle

no, sinx = 0.579555495,
x = sin-¹ 0.579555495 = 35.419 degrees.

Last edited by luca-deltodesco (2006-12-14 09:12:24)


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#5 2006-12-16 05:41:13

unique
Member
Registered: 2006-10-04
Posts: 419

Re: Traingle

thank you


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