How much bigger is mars then the planet earth

ANSWER:

As you can see from the above statistics, Mars is as a matter of fact smaller in size than planet Earth. In fact, the diameter of Earth is almost twice the diameter of Mars.

Essentially, Mars is not bigger than planet Earth. Therefore, this question can't be answered as its statement inferring that Mars is larger than Earth is false.

Hope this helps! :)
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Answerequatorial guinea,gabon, and western sahara;

Well, a and b together would be negative. b alone would also be negative.