Which could be the lengths of the sides of a right triangle

  •  0.9 cm, 1.2 cm, 1.5 cm

Step-by-step explanation:

You know that the triangle with side lengths 3, 4, and 5 is a right triangle. Any triangle with sides in the same ratio is a similar right triangle. The dimensions listed first have this ratio, with a scale factor of 0.3.

0.3·3 = 0.9

0.3·4 = 1.2

0.3·5 = 1.5

Comment on 3-4-5 triangle

The 3-4-5 right triangle is usually the first example shown to illustrate the Pythagorean theorem. That theorem says the square of the length of the hypotenuse of a right triangle is the sum of the squares of the lengths of the other two sides. That means ...

  5² = 3² + 4²

  25 = 9 + 16 . . . . true