SUPERTIMOXA

from math import sqrt, pi

# 1 Задача

a = 3

b = 5

c = sqrt(b**2-a**2)

s = c*a/2

print(s)

# 2 Задача

a = 8

b = 4

r = 2

st = sqrt((b/2)**2+r**2)

sc = pi*r**2

sr = a*b

s = st + sr - sc

print(c)