Folding Sculptures: A Focus on Surface Area and Scale Drawings

Middle School Math

Angles in Soccer

A circle with a label for its measure of 360 degrees. A dotted line is drawn to indicate the radius of the circle.

A circle is made up of 360°.
An angle made of two rays; dots indicate that each ray has a common endpoint at the vertex of the angle

An angle is considered to be two rays with a common endpoint.

Angle: A part of a line that starts at an endpoint and extends forever in one direction.
A 36-degree angle appears inside of a circle. The vertex of the angle is at the center of the circle.

Consider this common endpoint to be the center of a circle.

An angle is measured by how far “open” it is along the circle’s 360°.


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