Math  /  Geometry

QuestionFor the following right triangle, find the side length xx.

Studdy Solution

STEP 1

1. The triangle is a right triangle.
2. The sides labeled 9 and 12 are the legs of the triangle.
3. The side labeled x x is the hypotenuse.

STEP 2

1. Identify the Pythagorean Theorem.
2. Substitute the known values into the theorem.
3. Solve for x x .

STEP 3

Recall the Pythagorean Theorem, which states that in a right triangle, the square of the length of the hypotenuse (c c ) is equal to the sum of the squares of the lengths of the other two sides (a a and b b ):
c2=a2+b2 c^2 = a^2 + b^2

STEP 4

Substitute the known side lengths into the Pythagorean Theorem. Here, a=9 a = 9 , b=12 b = 12 , and c=x c = x .
x2=92+122 x^2 = 9^2 + 12^2

STEP 5

Calculate the squares of the known side lengths:
x2=81+144 x^2 = 81 + 144

STEP 6

Add the results to find the value of x2 x^2 :
x2=225 x^2 = 225

STEP 7

Solve for x x by taking the square root of both sides:
x=225 x = \sqrt{225}

STEP 8

Evaluate the square root:
x=15 x = 15
The side length x x is:
15 \boxed{15}

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