Question

of the angle of a triangle in a ratio of 4 5 9, find the measure of all angles and name the type of triangle.
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Answer 1

An atom is a particle of matter that uniquely defines achemical element. An atom consists of a central nucleus that is usually surrounded by one or more electrons. ... The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons. A proton is positively charged