Answer:
AB = [tex]\sqrt{65}[/tex] units
Step-by-step explanation:
Using Pythagoras' identity in the right triangle.
The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is
AB² = AC² + BC²
= 7² + 4²
= 49 + 16
= 65 ( take the square root of both sides )
AB = [tex]\sqrt{65}[/tex]
