Solution 
The volume of a triangular prism is the area
of the triangle times the length perpendicular to the triangle. In our case,
the length perpendicular to the triangle is the width. Area of triangle = 1/2bh =  1/2(length)(height) =  (1/2)(2 cm)(2cm) =  2 cm2 V = Triangle Area × width = 2 cm2 × 2 cm =  4cm3
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