Answer:
The answer is option 2.
Step-by-step explanation:
You can find it using Pythagoras Theorem' :
[tex] {c}^{2} = {a}^{2} + {b}^{2} [/tex]
Let a be 15 units,
Let b be 14 units,
[tex] {c}^{2} = {15}^{2} + {14}^{2} [/tex]
[tex] {c}^{2} = 421[/tex]
[tex]c = \sqrt{421} [/tex]
[tex]c = 20.5 \: units \: (3s.f)[/tex]
