# Area of a triangle given base and angles

## Calculates the area, perimeter and height of a triangle given the base and two angles.

angle θ1
 degree radian
angle θ2
 same unit as θ1
base a

area S
perimeter L
height h

 $\normal Triangle\ (a,b,\theta\rightarrow S)\\(1)\ area:\hspace{50} S={\large\frac{a^2}{2}}{\large\frac{\sin{\theta_1}\sin{\theta_2}}{\sin{(\theta_1+\theta_2)}}}\\(2)\ height:\hspace{40} h=a{\large\frac{\tan\theta_1\tan\theta_2}{\tan\theta_1+\tan\theta_2}}\\(3)\ perimeter:\ L=a+{\large\frac{h}{\sin\theta_1}}+{\large\frac{h}{\sin\theta_2}}\\$

To improve this 'Area of a triangle given base and angles Calculator', please fill in questionnaire.

Gender
Male Female
Age
Under 20 years old 20 years old level 30 years old level
40 years old level 50 years old level 60 years old level or over
Occupation
Elementary school/ Junior high-school student
High-school/ University/ Grad student A homemaker An office worker / A public employee
Self-employed people An engineer A teacher / A researcher Others
Useful?
Very A little Not at All
Purpose of use?
Comment/Request (Click here to report a bug).
Your feedback and comments may be posted as customer voice.