Question

pls do the 11 and 12 question.Do it fast with explanation,it's important​

Answer 1

Answer:

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Step-by-step explanation:

1. The sum of All angles of parallelogram is = 360°

2. hence the angle which is in front on an angle is in equal measurements

3. therefore the angle DCB=DAB, ABC=ADC

4. Therefore: Angle C+A+B+D=360

5. Therefore: (3x+3)+(2x+17)+(3x+3)+(2x+17)=360°

6. therefore : 3x+3+2x+17+3x+3+2x+17=360°

7. take variable one side

8. 3x+2x+3x+2x+3+17+3+17=360°

9. 10x+90=360°

10. 10x=360-90

11. 10x=270

12. x=270/10

13. x=27

14. "X" = 27

15. put value= 1. 3x+3= 3×27+3= 84°

2. 2x+17= 2×27+17 = 71°

3. Opposite sides are equal

4. therefore 84+71+84+71=360°