Triangle Area Calculator: Easy Base, Height & Area Computation

Enter any two of base, height or area; the calculator applies $$A=rac12bh$$ to compute the unknown instantly. Results display to 8 decimal places and handle magnitudes up to 9 × 10¹⁵ thanks to IEEE-754 double precision. Truss bridges—built from triangular members—form about 40 % of U.S. road bridges (FHWA, 2022), so quick triangle maths matters.