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Could someone please help me find the missing X? Thank you :))) only if you know.

Could someone please help me find the missing X? Thank you :))) only if you know.-example-1

1 Answer

6 votes

Answer:

x = 18
√(2)

Explanation:

Using Pythagoras' identity in the right triangle.

The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is

x² + 9² = 27²

x² + 81 = 729 ( subtract 81 from both sides )

x² = 648 ( take the square root of both sides )

x =
√(648) = 18
√(2) ← exact value

x ≈ 25.5 ( to 1 dec. place )

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