23. Latimea = (2/3) * 63 = 2*(63/3) = 2 * 21 = 42
Perim = 2*63 + 2*42 = 126 + 84 = 210
24.
Perim. drept. mare : 2*512 + 2*128 = 2*640 = 1280
Perim. drept. mic : 2*(512/2) + 2*(128/2) = 2*256 + 2*64 = 2*320 =640