Thank you for translating a question in English. How do you translate and understand the following English math problem? Thank you.

In a cube ABCDEFGH with opposite vertices C and E, J and I are the midpoints of sides FB and Hd, respectively. Let r be the ratio of the cross-sectional area to the area of one face of a cube. What is R2?

key word

cube

Cubes; Cubic; Cubic power; Cubic things; Cubic; Make (a number; Value) squared twice; Cut into small squares.

opposite

Opposite; Completely different; Quite the opposite; Objection; Right; Opposite; Opposite; Opposite; On the opposite side; On the opposite side of; Co-star with …

top of the head

To the highest point; Expenses; Zenith; (Complex number of vertices)

midpoint

superiority

Edge; Edge; Advantages; Sharp; Knife edge; (complex number of edge); Add edges to; To form an edge in; Move slowly; Move quietly; Sharpen; Sharpen.

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