text{area of L-shape}\times\text{length}\) This object is a triangular prism so the area of the cross-section is the area of a triangle. b) The area of the cross section is \(\text{5 cm}^ ...

The third has a triangular cross-section. (Sometimes the ‘cross-section’ is called the 'base'.) The distance between the two ends of the prism is always called the height of the prism even if ...