Plate Two
Distance between any two holes of the plate shown?
This is related to trigonometry and is a picture problem, although I cannot show you the picture, it's pretty simple. A circle 7.5cm diameter with 3 small holes each on the circle 120degrees apart from one another from the center. Find the distance between the holes.
cosine law
r = 7.5/2 = 3.75
d^2 = 3.75^2 + 3.75^2 - 2 (3.75) (3.75)cos 120 =42.1875
d = sqr(42.1875) = 6.495
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