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An angle that measures between 90 and 180° is called a(,

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?