Can anyone answer 9th question plz
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Step-by-step explanation: in triangle BDC since BC = DC
=>base angles are equal
=>angle DBC = angle BDC= x
=>by angle sum property, in triangle BDC
angle DBC + angle BDC + angle C = 180°
=>x +x + 40° = 180°
=>2x + 40° = 180°
=>2x = 180° - 40°
=>2x = 140°
=>x = 140/2
=>x=70°
=>angle BDC = 70°
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Angle 1 = Angle 2 opposite angle of equal side I think it's helpful for u
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