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Show that polygon $C$ has twice as many sides as polygon $B$.
Mathematics 0580 · IGCSE · Angles
Angles — practice question
Three regular polygons $A$, $B$ and $C$ are joined at one point. Their interior angles are in the ratio $a : b : c = 3 : 4 : 5$. The diagram labels the angles at the shared point as $a^\circ$, $b^\circ$ and $c^\circ$.