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Front view of circle is given and isometric view is to be drawn which of the following is correct procedure in drawing isometric view?

(a) turning the circle such that line on diameter is making 30 degrees with horizontal

(b) by increasing or decreasing angles between two perpendicular line on diameter at required proportions

(c) drawing line in diameter parallel to isometric axes

(d) enclosing circle in a square and aligning square to isometric axes and pointing four points on circle touching the square and joining by smooth curve.

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The question is from Isometric Drawing of Planes or Plane Figures topic in division Isometric Projection of Engineering Drawing

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The correct choice is (d) enclosing circle in a square and aligning square to isometric axes and pointing four points on circle touching the square and joining by smooth curve.

To explain: Circle will be circle even if we rotate it in angle with that plane. So to represent circle in isometric view it should be enclosed in a square and then aligning square to isometric axes and pointing points touching the square and drawing smooth curve.

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