To find the volume of a triangular prism you must first find the area of the triangular based then multiplied by the height of the prism is this true or false

False. To find the volume of a triangular prism, you need to find the area of the triangular base, then multiply by the height of the prism and divide by 2. This is because the formula for the volume of a prism is V = (1/2) * b * h * H, where b is the base of the triangle, h is the height of the triangle, and H is the height of the prism.