Question

Please help me to do this sum ​

Answer 1

Answer:

right answer of this question

c=110

b=70

Answer 2

a+b+c+d = 360°

a+2a+15°+3a+5°+70° = 360°

6a+ 90° = 360°

6a = 360°-90°

6a = 270°

a = 45°

b = 2a+15° = 2×45°+15° = 105°

c = 3a+5° = 3×45°+5° = 140°