# Math Is Fun Forum

Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫  π  -¹ ² ³ °

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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 *
*****************

Desi
Raat Key Rani !

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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.

The Beginning Of All Things To End.
The End Of All Things To Come.

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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

Desi
Raat Key Rani !

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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)

The Beginning Of All Things To End.
The End Of All Things To Come.

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

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

thank you

Desi
Raat Key Rani !

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