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cara cepat menemukan diagonal sisi persegi = sisi
cara rumus
Diagonal sisi =
=
=
=
= 10
a² + b² = c²
s² + s² = c²
10² + 10² = c²
100 + 100 = c²
200 = c²
√200 = √c²
√100.2 = √c²
10√2 = c
Jadi panjang diagonal persegi yang panjang sisinya 10 cm adalah 10√2 cm.