a)9,11,18 b)2,16,20 c)7,9,11 d)8,12,16 Dr tigaan phytagoras. Manakah yg dapat membentuk segitiga siku-siku, lancip,dan tumpul?

Jawab :

1) 9, 11, 8

11² = 9² + 8²
121 = 81 + 64
121 = 145
121 < 145 ∆. Lancip

2) 2, 16, 20

20² = 16² + 2²
400 = 256 + 4
400 = 260
400 > 260 ∆.Tumpul

3) 7, 9, 11

11² = 9² + 7²
121 = 81 + 49
121 = 130
121 < 130 ∆.Lancip

4) 8, 12, 16

16² = 12² + 8²
256 = 144 + 64
256 = 208
257 > 208 ∆.Tumpul