# Math Help - Can you help me?

1. ## Can you help me?

A,B and C are three points on the map such that the bearing of C from A is 50o and the bearing of C from B is 135o. The distance between A and B is 10 kilometers( See the figure )

Find the angles ABC and ACB
(a)Use the sine formula to find the distance between A and C and the distance between
B and C
Find The area of ABC

2. Hello,
Find the angles ABC and ACB
ABC=180-135 (because there's the line AB)
ACB=180-(BAC+ABC), because the sum of angles of a triangle is 180.

(a)Use the sine formula to find the distance between A and C and the distance between
B and C
http://en.wikipedia.org/wiki/Law_of_sines

Find The area of ABC
See in the same link, the formula :
$2R=\frac{abc}{2S}$
where S is the area

3. Thank you very much ..

For the area I used this formula:

Area=0.5*base*height

4. How did you find the height?

5. Originally Posted by HallsofIvy
How did you find the height?
Height=AC*sin 50