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Mapel : Matematika
Kelas : VII SMP
misal
sisi2 segitiga :
a = kaki
b = kaki
c = hipotenusa
Segitiga sama kaki, maka a = b
c² = a² + b²
c² = a² + a²
c² = 2a²
20² = 2a²
400 = 2a²
a² = 400 / 2
a² = 200
a = √200 cm
a = 10√2 cm