Step-by-step explanation:
use the pythagoras theory.
a2 + b2 = c2
the firth one use this formula
a2 = c2 - b2
a2 = 10.6² - 5.6²
a2 = 112.36 - 31.36
a2 = 81
a = 9
The same method use to the eighth one
-22(-0.2) - [ 2 (0.22)]
4.4 - 0.44 = 3.96
