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Find the value of x. Round your answer to the nearest tenth.

Find the value of x. Round your answer to the nearest tenth.-example-1
User Weibenfalk
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7.5k points

1 Answer

5 votes

Answer:

+4√5

Explanation:

Note that this is a right triangle. Therefore, the lengths of the three sides are related through the Pythagorean Theorem: a^2 + b^2 = c^2, where c is the length of the hypotenuse.

Thus, x^2 + 19^2 = 21^2, or, after solving this for x^2,

x^2 = 441 - 361 = 80

x is therefore +√80, or +4√5.

User Liviu Mandras
by
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