❓❓maths class 9 ❓❓
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In ABC
DE || BC
so angle DEB is vertically opp to EBC and therefore equal to it
angle DBE=180-(105+30)
DBE=45°
Angle B=30+45
B=75°
IN Triangle EBC
C=180-(80+30)
C=180-110
C=70°
in Triangle ABC by using the angle sum property
A=180-(B+C)
A=180-(70+75)
A=180-145
A=35°
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I have attached the answer!
hope this helps!❤️
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