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42 votes
42 votes
Find x in the right triangle

Find x in the right triangle-example-1
User Stevie Star
by
2.4k points

2 Answers

11 votes
11 votes

Answer:

C

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 + 7² = 14²

x² + 49 = 196 ( subtract 49 from both sides )

x² = 147 ( take square root of both sides )

x =
√(147)

User Gineer
by
2.9k points
17 votes
17 votes

Answer:

C. √147

Explanation:

Set the values of the triangle up in the Pythagorean Theorem.

a² + b² = c²

x² + 7² = 14²

Take 7 and 14 to the power of 2.

x² + 49 = 196

Subtract 49 from both sides.

x² = 147

Take the square root of both sides. There will only be one answer since lengths cannot be negative.

x = √147

User Peter Krautzberger
by
3.1k points