Question

Dau corona puncte varog urgent

Answer 1

2. fals

[AB]U[BA = [BA

3. dacă a = 0 atunci 5a = 0 => adevărat

4.

90° - 36° = 54°

180° - 36° = 144°

5.

47°32'36" + 142°15'43" = 189°47'79" = 189°48'19"

130°42' - 47°53'32" = 130°41'60" - 47°53'32" = 129°101'60" - 47°53'32" = 82°48'28"

87°33' : 2 = 86°93' : 2 = 86°92'60" : 2 = 43°46'30"