Answer: About 10 ft.
Use Pythagorean's Theorem!
c=
9 * 9 = 81
3 * 3 = 9
81 + 9 = 90
= 3
≈ 10 ft.
27) Solve: x – 9 = 20
2 answers:
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The square root of 729 is in fact 27, as it is a perfect square, but this is not well known, so we can figure it out like this:
What goes into 729 that are perfect squares? 81 and 9:
Take the square root of 81 (9) and the square root of 9 (3). Move these to the outside of the square root (they will multiply with 3 since 3 is multiplied to the square root in the original problem)
Now, just multiply: