The area of a triangle is equal to 48 cm2 and two of its dies measure 12 cm and 9.34, respectively. Find the measure of the included OBTUSE angle (in degrees) of the given sides. Round off your answer to two decimal places

Question

michele_laino · Answer

is your angle enclose between those sides?

michele_laino · Answer

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anonymous · Answer

yup

anonymous · Answer

i have an answer of 10.75 but not so sure of how to get the proper obtuse angle.

anonymous · Answer

and when I rechecked and went through my calculation I now have 121.07..

michele_laino · Answer

ok! the you have to apply this formula:
$$A = \frac{1}{2}12 \cdot 9.34 \cdot \sin x$$
where A is thearea of your triangle, namely A = 48 cm^2

bradely · Answer

use formula A =1/2(ab)sinC 48=1/2(12*9.34)sinC 56.04sinC =48 sinC = 0.86 Use calculator C=59 Source: http://www.mathskey.com/question2answer/

michele_laino · Answer

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anonymous · Answer

thanks a lot just got a bit confused -.-

michele_laino · Answer

please where you are confused?

michele_laino · Answer

please what is 
$$\frac{1}{2}12 \cdot 9.34 = ...?$$

anonymous · Answer

it's 56.04 then divide 48 by 56.04 = 0.857 then arcsin(0.857) =58.98