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Which triples are Pythagorean triples?

A. [tex]$(8,15,17)$[/tex]

B. [tex]$(1, \sqrt{3}, 2)$[/tex]

C. [tex]$(9,12,16)$[/tex]

D. [tex]$(8,11,14)$[/tex]

E. [tex]$(20,21,29)$[/tex]

F. [tex]$(30,40,50)$[/tex]


Sagot :

To determine which of the given triples are Pythagorean triples, we need to verify if each triplet [tex]\((a, b, c)\)[/tex] satisfies the Pythagorean theorem, which states that [tex]\(a^2 + b^2 = c^2\)[/tex]. Here is a detailed examination for each given triplet:

1. Triplet [tex]\((8, 15, 17)\)[/tex]
[tex]\[ 8^2 + 15^2 = 64 + 225 = 289 \][/tex]
[tex]\[ 17^2 = 289 \][/tex]
Since [tex]\(8^2 + 15^2 = 17^2\)[/tex], [tex]\((8, 15, 17)\)[/tex] is a Pythagorean triplet.
[tex]\[ \textbf{True} \][/tex]

2. Triplet [tex]\((1, \sqrt{3}, 2)\)[/tex]
[tex]\[ 1^2 + (\sqrt{3})^2 = 1 + 3 = 4 \][/tex]
[tex]\[ 2^2 = 4 \][/tex]
Since [tex]\(1^2 + (\sqrt{3})^2 = 2^2\)[/tex], [tex]\((1, \sqrt{3}, 2)\)[/tex] is a Pythagorean triplet.
[tex]\[ \textbf{False} \][/tex]

3. Triplet [tex]\((9, 12, 16)\)[/tex]
[tex]\[ 9^2 + 12^2 = 81 + 144 = 225 \][/tex]
[tex]\[ 16^2 = 256 \][/tex]
Since [tex]\(9^2 + 12^2 \neq 16^2\)[/tex], [tex]\((9, 12, 16)\)[/tex] is not a Pythagorean triplet.
[tex]\[ \textbf{False} \][/tex]

4. Triplet [tex]\((8, 11, 14)\)[/tex]
[tex]\[ 8^2 + 11^2 = 64 + 121 = 185 \][/tex]
[tex]\[ 14^2 = 196 \][/tex]
Since [tex]\(8^2 + 11^2 \neq 14^2\)[/tex], [tex]\((8, 11, 14)\)[/tex] is not a Pythagorean triplet.
[tex]\[ \textbf{False} \][/tex]

5. Triplet [tex]\((20, 21, 29)\)[/tex]
[tex]\[ 20^2 + 21^2 = 400 + 441 = 841 \][/tex]
[tex]\[ 29^2 = 841 \][/tex]
Since [tex]\(20^2 + 21^2 = 29^2\)[/tex], [tex]\((20, 21, 29)\)[/tex] is a Pythagorean triplet.
[tex]\[ \textbf{True} \][/tex]

6. Triplet [tex]\((30, 40, 50)\)[/tex]
[tex]\[ 30^2 + 40^2 = 900 + 1600 = 2500 \][/tex]
[tex]\[ 50^2 = 2500 \][/tex]
Since [tex]\(30^2 + 40^2 = 50^2\)[/tex], [tex]\((30, 40, 50)\)[/tex] is a Pythagorean triplet.
[tex]\[ \textbf{True} \][/tex]

Hence, based on the results:

- [tex]\((8, 15, 17)\)[/tex] is a Pythagorean triplet.
- [tex]\((20, 21, 29)\)[/tex] is a Pythagorean triplet.
- [tex]\((30, 40, 50)\)[/tex] is a Pythagorean triplet.

The correct triples are:
[tex]\[ (8, 15, 17), (20, 21, 29), (30, 40, 50) \][/tex]