the area of the triangular face (0.5 x base x height) times the length of the prism
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No. That will only give the volume which is not the same as the mass. You will either need to assume that the prism is of uniform density. In that case, you multiply its volume by the density.
Alternatively, you follow Archimedes' principle to determine the density or even the weight of the prism. Then you need to convert to mass by dividing by the force of gravity.
Not as easy as the first answer wrongly made it look.
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Mass = Density x Volume
To calculate the surface area of the equilateral triangular-based prism, you need to calculate the area of the equilateral triangle and all the other sides of the prism. The total area of all the phases will give the total surface are of an equilateral triangular based prism.
a triangular prism is different from a rectangular prism because: their names are different a triangular prism has a triangle for its' base a rectangular prism has a rectangle base a triangular prism has less sides than a rectangular prism a rectangular prism has more sides than a triangular prism
a triangle is 2D whereas a triangular prism is 3D.
the defnition of find the surface area of triangular prism and cylinder