In order to calculate the c side, use the Pythagorean theorem. All the other versions may be calculated with our triangular prism calculator. To get the volume of a regular pentagonal pyramid with a side length of a and a height of h: Square the side length to get a². The right triangular prism formula looks as follows: Volume Length ( (a b) / 2) Where: a and b are the sides of the triangle that touch the right angle and Length means the length of the entire prism, i.e., distance between two faces. 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) Triangular base: given two sides and the angle between them (SAS) However, we don't always have the three sides given. The Triangle Volumecalculator computes the volume of a triangular Triangular Volume shaped object (such as a prism) given the length the triangle's three sides and the height (h) of the area.
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