This measurement totals the distance around a plane figure's boundary.

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Your new ahaPerimeter

Perimeter: Measurement of the total distance around a shape's outer edge. Source: Perimeter ↗

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11These measures of rotation between rays are expressed in degrees or radians.RECALL
Angles
Angles measure the space between two intersecting lines, expressed in degrees or radians.
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12These straight lines in the same Euclidean plane never intersect.RECALL
Parallel Lines
Parallel lines stay the same distance apart forever, never intersecting no matter how far extended.
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13This shape's six identical square faces are joined by twelve edges, all equal in length.RECALL
Cube
A cube's six identical square faces are joined by twelve edges, all equal in length.
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