Answer:
The length of adjacent is 6.22cm
Step-by-step explanation:
You have to apply Pythagoras Theorem' :
[tex] {a}^{2} + {b}^{2} = {c}^{2} [/tex]
[tex]let \: b = 6.5 \\ let \: c = 9[/tex]
[tex] {a}^{2} + {6.5}^{2} = {9}^{2} [/tex]
[tex] {a}^{2} + 42.25 = 81[/tex]
[tex] {a}^{2} = 38.75[/tex]
[tex]a = \sqrt{38.75} [/tex]
[tex]a = 6.22[/tex]
