Discussion
Match the solid and cut with the section produced.
1. Cylinder cut perpendicular to its axis 2. Cylinder cut containing its axis 3. Cylinder cut obliquely to its axis
P. A rectangle Q. A circle R. An ellipse
Answer: B
Correct answer: 1-Q, 2-P, 3-R
The three cuts give the three sections a cylinder can produce. Perpendicular to the axis reproduces the base circle. Containing the axis gives the rectangle of diameter by height. And any oblique cut clear of the ends gives an ellipse, whose minor axis is always the diameter.
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