hi how to solve this..
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Answer:
we know that circle measure is 360°
d) is given a Right angle.
i.e: d=90
Arc AMB is 180°
Angle DMB is given 20°.
Therefore,
AMB=AMP+PMD+DMB
180°=90°+c+20°
c = 70°
Angle DMB = Angle AMC.... opposite angle
Therefore, a =20°
angle AMB= Angle AMC +Angle CMB
180°= 20° + b
b=160°
I hope you get it
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