1)By using dot(.) pattern,which of the following numbers can be arranged in two ways namely a triangle and a rectangle? Options-a)12 a)11 c)10 d)9 2)Is 10 a rectangular number,if (yes) how and if (no) how?
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From Wikipedia, the free encyclopedia. A number of geometric arrangements of dots (or similar units) have been given special names in mathematics, art and symbolism.
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