A representative sample accurately reflects a population and allows a study
1 answer:
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Forgive me if this is wrong. I haven't done stat in a year, but comment if you need clarification!
Answer:
a) A triangle which the angles ratio is 1 : 2 : 3 is a 30º - 60º - 90º right triangle.
b) The shortest side is opposite to the shortest angle. So, we can calculate it using sin 30º.