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irga5000 [103]
3 years ago
10

Geometry help. abcd is a parallelogram

Mathematics
1 answer:
joja [24]3 years ago
6 0
The first and the 2nd one are correct because x is 21 and y is 49
3 and 4 at wrong
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It is irrational, & cannot be written as a fraction.

Step-by-step explanation:

\sqrt{2} will give you a very odd number when plugged into the calculator.

1.414213562

With our knowledge of rational vs. irrational numbers, we know that means \sqrt{2} has to be irrational because it is not a whole number, not an integer, & cannot be condensed into a fraction.

Any time you see a number that isn't a perfect square in a square root, it might be best to guess it is irrational.

Always plug it into a calculator (if possible) to check!

Hope this helps. :)

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