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angleB=200
angleC=160
angleC=160
shally9:
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A=74,B:C=4:5
B=4x,C=5x
then B+C=180
4x+5x=180
9x=180
x=180/9=20
4x=4×20=80
5x=5×20=100
Now,A+B+C+D=360
74+80+100+D=360
254+D=360
D=360-254=106
B=4x,C=5x
then B+C=180
4x+5x=180
9x=180
x=180/9=20
4x=4×20=80
5x=5×20=100
Now,A+B+C+D=360
74+80+100+D=360
254+D=360
D=360-254=106
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