The result of the product property of square root, √a × √b = √(a×b), we have;
1. The side lengths are irrational because 5 and 3 are not perfect squares.
2. The area is equal to √(15). Since 15 is not a perfect square, the square root is irrational.
How can the product property be used to determine if the area is a rational number?
The given side lengths of the rectangle are;
Rational numbers can be expressed as a ratio, P/Q
Irrational numbers can not be expressed as a fraction
The numbers √5 and √3 are not expressible as fractions, therefore they are irrational numbers.
1. To explain whether the side lengths are rational or irrational
The correct options are therefore;
- The side lengths are irrational because 5 and 3 are not perfect squares
2. Is the value of the area of the rectangle rational or irrational?
Solution;
Area of a rectangle = Length × Breadth
Therefore;
The area = √5 × √3 = √(15)
√(15) is an irrational number, therefore;
Therefore;
- The area is equal to √(15). Since 15 is not a perfect square, the square root is irrational.
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