Using Pythagorean theorem c^2=a^2 + b^2, we can find the missing side b. Put values in equation. 18^2 = 8^2 + b^2 324=64+b^2 Subtract 64 from both sides 260= b^2 Take square root. 2√65=b or b=16.12
Answer: b=2√65 Radical form. or b=16.12 Decimal form.
