1
00:00:00,910 --> 00:00:03,770
Bine ai venit la lectia noastra despre grade si radiani

2
00:00:03,770 --> 00:00:07,010
probabil ca deja stiti

3
00:00:07,010 --> 00:00:07,950
conceptul de grad

4
00:00:07,950 --> 00:00:10,310
In exemplele noastre veti trece

5
00:00:10,310 --> 00:00:12,370
printr-o suita de probleme

6
00:00:12,370 --> 00:00:23,460
Probabil ca stii deja ca un unghi drept are 90 de grade.

7
00:00:23,460 --> 00:00:28,650
sau ca jumatatea unuil unghi drept are 45 de grade

8
00:00:28,650 --> 00:00:32,630
Si probabil ca stii deja ca

9
00:00:32,630 --> 00:00:36,610
intr-un cerc - si cam asa arata un cerc -

10
00:00:36,610 --> 00:00:38,760
desenat de mine

11
00:00:38,760 --> 00:00:41,010
Un cerc are 360 de grade

12
00:00:41,010 --> 00:00:44,750
Astazi va voi prezenta o noua unuitate de masura

13
00:00:44,750 --> 00:00:47,270
pentru unghiuri. Se numeste Radian

14
00:00:52,160 --> 00:00:53,450
Deci, ce este un radian?

15
00:00:53,450 --> 00:00:55,650
Voi incepe cu definitia

16
00:00:55,650 --> 00:00:57,105
ca sa va dati seama intuitiv de ce se cheama radian

17
00:01:01,380 --> 00:01:02,850
De data asta voi folosi o aplicatie care sa ma ajute sa desenez un cerc adevarat.

18
00:01:10,060 --> 00:01:14,270
Inca folosesc aplicatia radian, cerc

19
00:01:14,270 --> 00:01:14,530
ok