Math Problem Statement
Use the sketch tool to rotate segment CD 180° around point E.
Solution
To solve this, we need to rotate the line segment by 180 degrees around point .
Rotation by 180 degrees:
- When we rotate a point or a segment 180° around another point, the result is that each point on the segment ends up directly opposite to its starting position, at the same distance from the center of rotation.
- Essentially, if we reflect each point through the center of rotation, we get the rotated figure.
Steps for rotating segment :
- Identify Coordinates: Suppose the coordinates of , , and are known (or assume they can be plotted). The midpoint of segment is not relevant for this rotation but indicates the center of the segment.
- Rotate Points:
- Rotate point around by 180°.
- Rotate point around by 180°.
- The new positions of and will be directly opposite their current positions relative to point , forming a new segment.
Since this is a purely geometric operation (180° rotation results in a straight line opposite), the rotated segment would flip entirely over point .
Would you like more details or a step-by-step drawing approach?
Here are 5 related questions:
- How would the image change if we rotated by 90° instead of 180°?
- What are the general rules for rotating a point around another point?
- How do you calculate the new coordinates of a point after rotation?
- What happens to the distance between points during a 180° rotation?
- How do you define the direction of rotation (clockwise vs. counterclockwise)?
Tip: For 180° rotations, the new coordinates of any point become relative to the center of rotation.
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Math Problem Analysis
Mathematical Concepts
Geometry
Rotation
Line Segment
Formulas
Rotation formula: new coordinates after 180° rotation (x', y') = (-x, -y) relative to the center of rotation
Theorems
Rotation theorem
Symmetry theorem
Suitable Grade Level
Grades 8-10