The answer is
If the four lines are extended, which system would have only one solution? On a coordinate plane, lines a and b would intersect.
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Let the unknown side be "z" inches
Through pythagoras:
Because the square of the two sides add up to the square of the hypotenuse in a right triangle.
This means that
So the missing side is 16 inches
Hope this helped
Through pythagoras:
Because the square of the two sides add up to the square of the hypotenuse in a right triangle.
This means that
So the missing side is 16 inches
Hope this helped