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Asumsi saja begitu:
Untuk segitiga siku-siku:
Bag a.
Luas:
Bag b.
Sisi miring,
Berlaku phytagoras.
b) sm² = (2-√11)² + (2+√11)²
= 4 - 4√11 + 11 + 4 + 4√11 + 11
= 30
sm = √30 cm