Create two triangle classes, one where the internal properties are stored on the stack and one where the internal properties are stored on the heap.  Each triangle should have a base, height, and a function that returns the area.

Triangles 1:  Create a vector of triangles where everything is stored on the stack. 

Triangles 2: Create a vector of triangles where everything is stored on the heap.

Triangles 3:  Create a vector where the items in the vector are stored on the stack, but the individual items have some data on the heap.

Triangles 4: Create a vector where the items in the vector are stored on the heap, but the individual items use no dynamic memory.

Note:  Think about what version of the triangle you should use for each scenario and make sure you do not have any memory leaks.