[G.CO.1] Congruence #1

Objective

Common Core Text:

  • [G.CO.1] Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment, based on the undefined notion of point, line, distance along a line, and distance around a circular arc.

Said Differently:

  • Define and Identify

    • Angles

    • Circles

    • Perpendicular lines

    • Parallel lines

    • Line Segments

Example

Fill in the blank

An __________ measures rotation.

Answer: angle

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Explanation

In grades K-8, you learned all of these terms informally. In other words, you generally knew what the terms mean, but maybe not their precise mathematical definitions. Now it's time to learn their precise definitions.

Click the terms below to learn more

Angle

Circle

Perpendicular Lines

Parallel Lines

Line Segment

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Practice