# Area of a triangle given sides and angle Calculator

## Calculates the area, perimeter and height of a triangle given two sides and the angle.

 side a side b angle θ degreeradian 6digit10digit14digit18digit22digit26digit30digit34digit38digit42digit46digit50digit area S perimeter L height h
 $\normal Triangle\ (a,b,\theta\rightarrow S)\\(1)\ area:\hspace{50} S={\large\frac{1}{2}}ab {\hfill{1}} \sin{\theta}\\(2)\ perimeter:\ L=a+b+\sqrt{a^2+b^2-2ab{ {\hfill{1}} \cos{\theta}}}\\\vspace{5}(3)\ height:\hspace{40} h=b\hspace{2}sin{\theta}\\$

Area of a triangle given sides and angle
 [1-4] /4 Disp-Num5103050100200
[1]  2017/09/13 16:53   Male / 50 years old level / An engineer / Very /
Purpose of use
Just to check whether term sqrt(a^2+b^2-2*a*b*cos(theta)), in formula for "perimeter", may give correct answer (altrough I have already known that it can''t); for example a=b=2^32, theta =1/2^48, just 26 significant figgures, out of 50, due to cosine being too close to 1, better method: c=sqrt((a-b)^2+4*a*b*(sin(theta/2))^2), but nobody uses it, except Professor William Kahan, a few other people and me :-)
Comment/Request
Maybe you may use term that I have proposed, instead of "ordinary used" one...
[2]  2017/09/09 14:06   Female / Under 20 years old / High-school/ University/ Grad student / Very /
Purpose of use
Check answers to see if the java program I wrote works
[3]  2017/08/16 09:54   Female / Under 20 years old / Elementary school/ Junior high-school student / Not at All /
Purpose of use
School
Comment/Request
[4]  2014/07/26 22:21   Male / 30 years old level / An engineer / A little /
Purpose of use
time past
Comment/Request
i need

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