Odpowiedź:
9² + 12² = NL²
81 + 144 = NL²
NL = ✓225
NL = 15
15² + KN² = 17²
225 + KN² = 289
KN² = 289 - 225
KN = ✓64
KN = 8
Obw. = 17 + 8 + 9 + 12 + 17 = 63 cm
P = ½ • 8 • 15 + ½ • 9 • 12 = 60 + 54 = 114 cm²
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Odpowiedź:
9² + 12² = NL²
81 + 144 = NL²
NL = ✓225
NL = 15
15² + KN² = 17²
225 + KN² = 289
KN² = 289 - 225
KN = ✓64
KN = 8
Obw. = 17 + 8 + 9 + 12 + 17 = 63 cm
P = ½ • 8 • 15 + ½ • 9 • 12 = 60 + 54 = 114 cm²