All the other versions may be calculated with our triangular prism calculator. The only option when you can't calculate triangular prism volume is to have a given triangle base and its height (do you know why? Think about it for a moment). Using law of sines, we can find the two sides of the triangular base:Īrea = (length * (a + a * (sin(angle1) / sin(angle1+angle2)) + a * (sin(angle2) / sin(angle1+angle2)))) + a * ((a * sin(angle1)) / sin(angle1 + angle2)) * sin(angle2) Triangular base: given two angles and a side between them (ASA) Using law of cosines, we can find the third triangle side:Īrea = length * (a + b + √( b² + a² - (2 * b * a * cos(angle)))) + a * b * sin(angle) Look at the triangle and write down the base width and height. Part 1 Finding the Area of the Triangle 1 Find the height and width of a triangle base. Triangular base: given two sides and the angle between them (SAS) To calculate the volume, all you have to do is find the area of one of the triangular bases and multiply it by the height of the prism. However, we don't always have the three sides given.
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