Answer:
I believe the answer is 5 units. Because it shows the line's arrow at unit 5.
This I my explanation for this question if it is helpful your welcome
Obtuse triangle Pythagorean Theorem
c² > a² + b²
20² > x² + 3x²
400 > 4x²
<u>÷4 ÷4</u>
<u> 100 > x²</u>
10 > x
400 > 4(7.1)²
400 > 4(50.41)
400 > 201.64
The greatest possible value of x is 7.10
They are both equal because in decimals you can add thousands of zeros and it's still equal.