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a√2=10m /:√2
a=10/√2∧√2/√2
a=10√2/2
a=5√2
Ob=2∧5√2+10
Ob=10√2+10m
pozdrawiam .
a = b
z tw. Pitagorasa:
a²+b² = c²
a²+a² = c²
2a² = c²
2a² = 10²
2a² = 100 |:2
a² = 50
a = √50
a = √25*2
a = 5√2
h = a
P = 1/2ah
P = 1/2*5√2*5√2
P = 1/2*25*2
P = 25 cm²