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they are part of a castle and they are tall.....and square
the square root of 17 is not a perfect square, so it can't be reduced to a rational number. √17 ≈ 4.1231 but the decimal place keeps going on forever
Set squares are useful for drawing parallel lines and perpendicular lines.
Because the square root of the discriminant is a component of the roots of the equation.
No, an irrational number is, in simple terms, a number that keeps repeating. The square root of 4 is positive or negative 2, which does not repeat and is therefore rational.