По теореме Пифагора с^2 = a^2 + b^2
1) c^2 = 6^2 + 8^2 = 36 + 64 = 100; c = 10
2) c^2 = 15^2 + 8^2 = 225 + 64 = 289; c = 17
3) c^2 = 1^2 + 1^2 = 1 + 1 = 2; c=√2
4) c^2 = 1.5^2 + 2^2 = 2.25 + 4 = 6.25; c = 2.5
5) c^2 = 0.5^2 + 1.2^2 = 0.25 + 1.44 = 1.69; c = 1.3
6) c^2 = 0.8^2 + 0.6^2 = 0.64 + 0.36 = 1; c = 1