### Which number between 20 and 40 is both a triangular number and a square number 36 or 25 or 21 or 35?

### Show How 5.619. is the square root of 35?

It is only an approximation to the square root of 35 - the square root of 35 is an irrational number. Besides, 5.619 is not approximately the square root of 35; the square root of 35 is approx 5.916 (I suspect a typo in the question). Two ways: Square it: 5.916 x 5.916 = 34.999056 ≈ 35 Calculate the square root of 35: .............. 5 . . 9 . 1 . 6 . 0…

### How do you find the square root of 35?

Square roots are not fun to figure out by hand, but you can do it. First, let me explain what a square root is, just in case you're wondering. sqrt(35) is asking, "What number times itself is 35?" Now that that's sorted, you should see how square roots are the "opposite" of square numbers. A square number is just the answer to "a number times itself" Some easy perfect squares to remember are: 0 =…