Réponse:
bonjour,
1) GI² = UG² + UI²
GI² = 7² + 24²
GI² = 49 + 576
GI = √625
GI = 25 cm
2) NF² = UF² + UN²
15² = 36²+ UN²
225 = 1296 + UN²
UN² = 1296 - 225
UN = √1070
UN = 33 dm
3) TO² = YT² + YO²
TO² = 21² + 20²
TO² = 441 + 400
TO = √841
TO = 29 mm
4) YO² = JO² + JY²
YO² = 12² + 16²
YO² = 144 + 256
YO = √400
YO = 20 km