Figuring out angles and lengths from limited information

**TheEmptySet** · June 9th 2009, 02:59 PM

Originally Posted by prettiestfriend

Something is wrong with your angles

$23^\circ +48^\circ \ne 69^\circ$

Start by looking there

**prettiestfriend** · June 9th 2009, 03:14 PM

Oh.

Um well 48 is incorrect then, it should be 46 degrees. However, this has no effect on the results I got - I didn't use it in my calculations.

**TheEmptySet** · June 9th 2009, 03:26 PM

Originally Posted by TheEmptySet

Something is wrong with your angles

$23^\circ +48^\circ \ne 69^\circ$

Start by looking there

$\tan(23)=\frac{BD}{BC}$

$\tan(69)=\frac{BD+AD}{BC}$

And you know BC.

So solve for BD then use it in the 2nd to find AD

**aidan** · June 9th 2009, 06:18 PM

Originally Posted by prettiestfriend

27.039

Your answer is correct.

However, 27.0 is closer to 27.039 than 27.1

Thread: Figuring out angles and lengths from limited information