Thursday

March 26, 2015

March 26, 2015

Posted by **hazel** on Saturday, November 23, 2013 at 10:19am.

- math -
**Reiny**, Saturday, November 23, 2013 at 12:50pmA very common formula for the area of a triangle with sides A and B with Ø the contained or included angle between them is

Area = (1/2)(A)(B)sinØ

then

(1/2)(12)(9)sinØ = 48

sinØ = .88888..

Ø = appr 62.7° or 117.3°

make a sketch to see why this is so.

remember:

sinx = sin(180°-x)

**Answer this Question**

**Related Questions**

Calculus - An isosceles triangle is to be drawn with its two equal sides of ...

MATH - the measures of the interior angles of a triangle are x,y and 2x ...

math - the measures of the interior angles of a triangle are x,y and 2x ...

geometry - find the value of x in each triangle: triangle x has 1 angle at 53 ...

geometry - find the value of x in each triangle: triangle x has 1 angle at 53 ...

Geometry - A triangle has two congruent angles and an exterior angle with ...

AMBIGUOUS CASE OF SINE LAW - Triangle DEF where triangle E = 144 degrees, e = 10...

algebra. - problems about angles: Hi. I needed help on some problems for the ...

math - One interior angle of a triangle has a measure that is equal to the sum ...

Math - The two equal sides of an isosceles triangle are each 24 centimeters. If ...