5. Illustrate, if possible, each one of the following with a rough diagram e E
(a) A closed curve that is not a polygon. V
(b) An open curve made up entirely of line segments.
(c) A polygon with two sides.
4.10 Angles
Q
R.
Angles are made
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Answer:
An observer can see through a pinhole. The top end of a thin rod of height h placed as shown in the figure,
The beaker height is 3h and its radius h. When the beaker is filled with a liquid up to a height 2h, he can see
the lower end of the rod. The ref: index of the liquid is
1)5/2
2)(5/2)1/2
3)3/2
4)7/3
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