The ancient Egyptians had a neat way to construct right angles. They would make a long rope with knots to make 121212 equal sections.

When they stretched the rope into the triangle shown below, they always got a right angle. This was useful when planning the pyramids, for example.

If we apply the Pythagorean Theorem to the Egyptian knots we can see that 3^2 + 4^2 = 5^23
2
+4
2
=5
2
3, squared, plus, 4, squared, equals, 5, squared.
Which of the sets of three numbers listed would also let you form a right angle in this way?
Choose all answers that apply:
Choose all answers that apply:

(Choice A, Incorrect)
INCORRECT
\text{\{1, 1, 1\}}{1, 1, 1}start text, left brace, 1, comma, space, 1, comma, space, 1, right brace, end text

(Choice B, Checked, Correct)
CORRECT (SELECTED)
\text{\{51, 149, 140\}}{51, 149, 140}start text, left brace, 51, comma, space, 149, comma, space, 140, right brace, end text

(Choice C, Checked, Correct)
CORRECT (SELECTED)
\text{\{16, 63, 65\}}{16, 63, 65}start text, left brace, 16, comma, space, 63, comma, space, 65, right brace, end text

(Choice D, Incorrect)
INCORRECT
\text{\{6, 11, 8\}}{6, 11, 8}start text, left brace, 6, comma, space, 11, comma, space, 8, right brace, end text