Answer:
<u>The true statements are:</u>
1) The equation a squared + (√13) squared = 6 squared can be used to find the unknown length.
2) The length of the unknown leg is √23 meters.
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Step-by-step explanation:
The hypotenuse of the right triangle = 6
And the length of one leg is √13
using Pythagorean equation: c² = a² + b²
where c is the hypotenuse and a , b are the length of the two legs
So, the third side = 
<u>So, the true statements are:</u>
1) The equation a squared + (√13) squared = 6 squared can be used to find the unknown length.
2) The length of the unknown leg is √23 meters.