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Answer:
X=Y=55°
Z=45°
Step-by-step explanation:
IN Δ ABC
AB=AC
∴x=y
∠A+x+y=180°
2x=180-70
x =110/2=55°
x=y=55°
in ΔBCD
BC=CD
∴∠CBD=∠BDC =z
z=180-90/2
= 90/2
=45°
z=45°
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