In the figure below, $ABCDE$ is part of a regular decagon ($10$-sided). Writing down the reasons

Question

In the figure below, $ABCDE$ is part of a regular decagon ($10$-sided). Writing down the reasons clearly, find the value of $\angle BCD$, $\angle BDE$, $\angle DBF$, $\angle BAF$.

Accepted Answer

(a) $\angle BCD=144^\circ$ (b) $\angle BDE=126^\circ$ (c) $\angle DBF=54^\circ$ (d) $\angle BAF=54^\circ$

Angle Relationships in a Figure Derived from a Regular Decagon

Angle Relationships in a Figure Derived from a Regular Decagon

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