Saturday

August 30, 2014

August 30, 2014

Posted by **Anonymous** on Monday, October 10, 2011 at 10:47am.

- math -
**Steve**, Monday, October 10, 2011 at 12:29pmIf you don't have access to heron's formula, then you can use law of sines

sin a/9 = sin b/10 = sin c/11

c = 180-(a+b)

work on that a while and you will find sin b = .8578

Now, h/9 = sin b

so h = 9 sin b

area = 1/2 * 11 * 9 * .8578 = 42.46

Heron's formula says that

with s = (a+b+c)/2

area = sqrt(15*4*5*6) = 42.43

looks good to me.

- math -
**Anonymous**, Monday, December 9, 2013 at 2:06pmWROOOOOONG

**Related Questions**

9th grade - given that a(-1,8) ,b(2,4) and if the line y=4 is the axis of ...

HELP!!!!RIGHT NOW!!!! - Which set of side lengths shows similar triangles? (1 ...

Math - Which set of side lengths shows similar triangles? Triangle ABC : 40, 20...

Geometry - Given: X, Y, and Z are the midpoints of teh sides of triangle ABC. ...

math - Let P and Q be the points on the sides AB and BC of a triangle ABC ...

Hard Geometry Problem - Hi guys. I need a lot of help on this. "Equilateral ...

Math - A(-11,8)B(2,-6) and C(-19,-8) are the vertices of Triangle ABC. N(X,Y) is...

geometry - The medial triangle of a triangle ABC is the triangle whose vertices...

Algebra - Triangles ABC and DEF are similar. Find the area of triangle ABC. ...

algebra - Triangles ABC and DEF are similar. Find the area of triangle ABC. ...