∠ABE=108°
∠EBC=72°
∠EBC=∠DBE=72°
∠ABD=180°-(2*72°)=36°
∠DBC=144°
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∠ABE=108°
∠EBC=72°
∠EBC=∠DBE=72°
∠ABD=180°-(2*72°)=36°
∠DBC=144°