Goal: Think like a mathematician! Read the problem multiple times.
Imagine you are a ninja that can slice solid objects straight through. You have a solid cube in front of you. You are curious about what 2-dimensional shapes are formed when you slice the cube. For example, if you make a slice through the center of the cube that is parallel to one of the faces, the cross section is a square:
For each of the following slices, (i) describe using precise mathematical language the shape of the cross section. (ii) draw a diagram showing the cross section of the cube.
a. A slice containing edge AC and edge EG
b. A slice containing the vertices C, B, and G
c. A slice containing the vertex A, the midpoint of edge EG, and the midpoint of edge FG
Source: Illustrative Mathematics 7.G.A.3 Task
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