9.1
Step-by-step explanation:
Let,
hypotenuse = 12.3 cm
perpendicular = 8.2 cm
base = y cm
(hypotenuse)^2 = (perpendicular)^2 + (base)^2
(12.3)^2 = (8.2)^2 + y^2
151.29 = 67.24 + y^2
151.29 - 67.24 = y^2
.: y^2 = 84.05
y = √84.05
y = 9.1
take it another