a) |AB| = |BC| = a = 10
|AC| = a√2 = 10√2
Obw = 2a + a√2 = 2 • 10 + 10√2 = 20 + 10√2
P = a² • ½ = 10² • ½ = 100 • ½ = 50
b) |BC| = a√2 = 12
|AB| = |AC| = a = 12 : √2 = 6√2
Obw = 2a + a√2 = 2 • 6√2 + 12 = 12 + 12√2
P = a² • ½ = 6² • ½ = 36 • ½ = 18
;)
