1) Trace la figure sur ton cahier.
2) AC² = 15² - 8²
= 225 - 64
= 161
Donc, AC = √ 161
= 12,6885775404
3) AD² = AC² + CD²
= 161 + 100
= 261
Donc, AD = √ 261
= 16,1554944214
= 16,2
