Question

Pythagoras anyone???

Answer 1

8^2 + 5^2 = 64+25 = 89 = square root 89
I don't have a calculator on me lol.

that specific side opposite the right angle is always the longest angle
a^2+b^2=c^2

Answer 2

The longest side is opposite of the right angle.
b^2+c^2=a^2
8^2+5^2=a^2
64+25=square root 89
a=9.43398113206
round it
a=9.4