Thread: solving triangles this time i will show what to find.

1. solving triangles this time i will show what to find.

1)triangleABC:angleA=155degrees,b=2,c=7
find angleB, angleC,and side a

i hope this explains enough if not tell me i have more questions but i need to know if you understand me.

2. Always gotta have a picture.

$a^2 = b^2 + c^2 - 2bc Cos A$

Plug in what we have: $a^2 = 2^2 + 7^2 - 2(2)(7) Cos 155$

Find an approximate answer. Round as necessary.

From there you could use the Law of Sines twice for the other two angles.

3. do i determine the C or the B first

4. it doesn't matter.

5. i finished all my solving triangles now im on problem solving with triangles. so if you want to go ahead and show me how to do those be my guest.