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January 25, 2015

January 25, 2015

Posted by **Tareena-- check my answer please** on Saturday, May 24, 2008 at 4:26pm.

My answers :

idont know whis one is right

method # 1:

suppose b= 8, c=10,a=?

a^2+b^2=c^2

a^2=(10)^2-(8)^2=

100-64=36

taking sqaur root of 36

a=6

method #2

A= unknown

B= unknown

C=35 degrees

a=unkown

b=8km

c=10km

using law of sin

sin 35/10=sinB/8

=.45

B=.45 dgrees

then B+C-180=A

.45+35-180=144.5

A=144.5

using law of sin

sin 35/10=sin 144.5/a

=10.12

a=10.12

- Math -
**drwls**, Saturday, May 24, 2008 at 5:19pmThe law of sines is the way to do this. That is your method #2. Method #1 only applies to right triangles.

You made some algebra errors, however.

sin B = 0.4589

B = 27.3 degrees

180 - B - C = A , not what you wrote.

- Math -
**Tareena-- check my answer please**, Saturday, May 24, 2008 at 5:22pmhow does B= 27.3 how did u come up with that number

- Math -
**Tareena-- drwls check my answer please**, Saturday, May 24, 2008 at 5:32pmthanks

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