class 8 math lesson 1 (geometry)
TRANSCRIPT
- 1. 1
- 2. 01
- 3.
- 4. A CD B
- 5. ...
- 6. -- -: A C D B : , ABCD AC , :A B AC 4 DCBA ABC ADC
- 7. A CD B [ ] [ ] 2 BACBBAC 2 DACDDAC BACBBAC )22( DACDDAC ABACDAC CACBACD , 4 DCBA [ 2 ] [ 2 ] [ () ()] [ ()]
- 8. -: A CD B : , ABCD AC BD , () AB = CD , AD = BC () ADCABCBCDBAD , :
- 9.
- 10. () ? () ? () ? ?
- 11. -: -:
- 12.