Solve a Triangle

• Nov 8th 2011, 06:16 AM
dazedandmathfused
Solve a Triangle
Please Solve the triangle ABC when

a = 7.5

b = 12,

and A = 35 degrees

Thank You, I don't know what to do.
• Nov 8th 2011, 06:32 AM
TheEmptySet
Re: Solve a Triangle
Quote:

Originally Posted by dazedandmathfused
Please Solve the triangle ABC when

a = 7.5

b = 12,

and A = 35 degrees

Thank You, I don't know what to do.

First you need to DRAW a triangle with angle A across from side A.

Now use the Law of sines to find the missing sides of the triagnle.

Law of sines - Wikipedia, the free encyclopedia
• Nov 8th 2011, 06:55 AM
dazedandmathfused
Re: Solve a Triangle
Quote:

Originally Posted by TheEmptySet
First you need to DRAW a triangle with angle A across from side A.

Now use the Law of sines to find the missing sides of the triagnle.

Law of sines - Wikipedia, the free encyclopedia

Thats all? .
• Nov 8th 2011, 06:58 AM
TheEmptySet
Re: Solve a Triangle
Quote:

Originally Posted by dazedandmathfused
Thats all? .

I do not understand your question. Did you use the law of sines. If so that is all. Did you look at the example in the link. They do an almost identical problem.
• Nov 8th 2011, 08:13 AM
e^(i*pi)
Re: Solve a Triangle
Quote:

Originally Posted by dazedandmathfused
Please Solve the triangle ABC when

a = 7.5

b = 12,

and A = 35 degrees

Thank You, I don't know what to do.

I don't know what you mean by "Solve the triangle" but I'm guessing you need to find the missing sides and angles?

1. Use the sine law to find angle B
2. Find angle C (hint: all angles in a triangle add up to 180 degrees)
3. Use the sine law again to find side c

Note the convention that sides a, b and c are opposite to angles A, B and C respectively