We are given that the sides of a right triangle are $x$, $x+1$, and $x+2$. We need to find the side lengths of the triangle by solving for $x$.

AlgebraPythagorean TheoremQuadratic EquationsAlgebraRight TrianglesProblem Solving
2025/3/24

1. Problem Description

We are given that the sides of a right triangle are xx, x+1x+1, and x+2x+2. We need to find the side lengths of the triangle by solving for xx.

2. Solution Steps

Since the sides of the triangle are xx, x+1x+1, and x+2x+2, and it is a right triangle, we can apply the Pythagorean theorem. Since x+2x+2 is the largest side, it is the hypotenuse. Thus, we have
x2+(x+1)2=(x+2)2x^2 + (x+1)^2 = (x+2)^2
Expanding the terms, we get
x2+(x2+2x+1)=x2+4x+4x^2 + (x^2 + 2x + 1) = x^2 + 4x + 4
Combining like terms, we have
2x2+2x+1=x2+4x+42x^2 + 2x + 1 = x^2 + 4x + 4
Subtracting x2+4x+4x^2 + 4x + 4 from both sides, we have
x22x3=0x^2 - 2x - 3 = 0
Now, we factor the quadratic equation:
(x3)(x+1)=0(x-3)(x+1) = 0
The solutions are x=3x=3 and x=1x=-1. Since xx represents a side length, it must be positive. Therefore, x=3x=3.
The side lengths are x=3x=3, x+1=3+1=4x+1=3+1=4, and x+2=3+2=5x+2=3+2=5.
We check if the Pythagorean theorem holds: 32+42=9+16=25=523^2 + 4^2 = 9 + 16 = 25 = 5^2. So the side lengths are 3, 4, and
5.

3. Final Answer

The side lengths of the triangle are 3, 4, and 5.

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