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A full circle is 360°.

Divide the full circle into five congruent parts or arcs formed by 5 distinct points on a circle.

360 ° ÷ 5 = 72 °

Each arc has 72 degrees in measure.

Each central angle that intercepts the arc is also 72° in measure.

To convert degree measure to radians:

Degree measure ×

180°

72 ° x

180°

= 72/180 radian or 2/5 radians

Divide the full circle into five congruent parts or arcs formed by 5 distinct points on a circle.

360 ° ÷ 5 = 72 °

Each arc has 72 degrees in measure.

Each central angle that intercepts the arc is also 72° in measure.

To convert degree measure to radians:

Degree measure ×

__π__= radian180°

72 ° x

__π__= radian180°

= 72/180 radian or 2/5 radians