Wyznacz pole i obwód kwadratu którego przękotna jest o 2 dłuższa od boku .
d = a + 2
d = a√2
a + 2 = a√2
a - a√2 = -2
a(1 - √2) = -2
a = -2/ (1 - √2)
a = 2 / (√2 - 1)
a = 2(√2 + 1) / (2 - 1)
a = 2(√2 + 1)
P = a² = [2(√2 + 1)]² = 4(2 + 2√2 + 1) = (12 + 8√2) cm²
Ob = 4 * a = 4 * 2(√2 + 1) = 8(√2 +1) cm
a - bok kwadratu
P = ? - pole kwadratu
Ob = ? o-bwód kwadratu
1.Obliczam bok a kwadrat ------
bok kwadratu
ob
P=a kwadrat
p=chyba 10, ale podstaw sobie sam dla sprawdzenia
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d = a + 2
d = a√2
a + 2 = a√2
a - a√2 = -2
a(1 - √2) = -2
a = -2/ (1 - √2)
a = 2 / (√2 - 1)
a = 2(√2 + 1) / (2 - 1)
a = 2(√2 + 1)
P = a² = [2(√2 + 1)]² = 4(2 + 2√2 + 1) = (12 + 8√2) cm²
Ob = 4 * a = 4 * 2(√2 + 1) = 8(√2 +1) cm
a - bok kwadratu
d = a + 2
P = ? - pole kwadratu
Ob = ? o-bwód kwadratu
1.Obliczam bok a kwadrat
------
bok kwadratu
ob
P=a kwadrat
p=chyba 10, ale podstaw sobie sam dla sprawdzenia