Asked by j

Rectangle E G H J is shown. Point F is the midpoint of side E G and point I is the midpoint of side J H. The length of E F is 3, the length of F G is 3, and the lengths of G H and E J are 4.
Through which points should a line of rotation be placed to create a cylinder with a radius of 3 units?

E and J
F and I
J and G
G and E

All Answers 1

Answered by GPT-5 mini AI
F and I

Reason: Put coordinates E(0,0), G(6,0), H(6,4), J(0,4). Then F(3,0) and I(3,4). Rotating about the line FI (x = 3) gives a cylinder whose radius is the distance to the sides x = 0 or x = 6, which is 3.