7.2 units
1) LEt's apply the Pythagorean Theorem for that
hypotenuse² = leg 1 ² + leg 2 ²
2) In this case, we can write out:
c² = 6² +4² The hypotenuse is opposite to the right angle
c² = 36 +16
√c² = √52
c =√52 or 2√13
c ≈7.2 Rounding off to the nearest tenth