bonjour
soit ABC le triangle rectangle en B
AC² = 1 ² + 3/4 ² = 1 + 0.75² = 1 + 0.5625 = 1.5625
AC = √1.5625 = 1.25 hm
Périmètre = 1 + 0.75 + 1.25 = 3 hm
aire = ( 1 x 0.75 ) / 2 = 0.75/2 ) 0.375 hm²
375 000 000 = 3.75 * 10 ⁸
0.000 05 = 5 * 10 ⁻⁵
0.000 25 = 2.5 * 10 ⁻⁴
144 000 000 = 1.44 * 10 ⁸
10 ⁵ * 10 ³ = 10 ⁸
100 000 = 10 ⁵
0.000 001 = 10 ⁻⁶
10 ⁵ x 10 ⁻³ = 10 ²
10⁷ / 10 ⁴ = 10 ³
10 ⁶ / 10 ⁻³ = 10 ⁹