Answer:
Surface Area of a Triangular Prism Calculator
In the general surface area is defined as the total area the surface of the object occupies. A triangular prism is a polyhedron that has a triangular base. It has 5 faces and 9 edges. Use our online surface area of a triangular prism calculator to efficiently calculate the total surface area occupied by the triangular based prism. Enter the triangle's sides, base, height, and prism height in the prism calculator to find the SA of the triangular prism.
Step-by-step explanation:
Length A is (8,0) and the length of B is (0,6)
hear here is your answer in attachment attach
Half of 2/3 is:

This means that 1/3 was left. This also means that they ate 1/3 of the lasagne.
Model diagram can be seen in attachment.