To find the volume of a triangular prism, you must first find the area of the triangular base then multiply by the height of the prism finally, dividing by 3.

Lucia has a triangular prism that has a length of 6cm and the width of 4cm and the height is 8cm. What is the volume

Julie uses a tent like the one shown to go camping with friends. The tent is 7 feet tall, 10 feet wide and 12 feet long. 

The Toblerone candy come in a package like the triangular prism. The bases of the triangles are 2 inches with a height of 2.5 inches. The faces are 10 inches in length. 
What is the volume of the package? 

This triangular trough is 9.5 cm long, 12 cm wide at the top, and 7.5 cm deep. How much water will it hold? Give your answer in litres.