Math Problem Statement

What is the image point of left parenthesis, minus, 5, comma, minus, 7, right parenthesis(−5,−7) after the transformation R, start subscript, 180, degrees, end subscript, circle, T, start subscript, 0, comma, 0, end subscriptR 180 ∘

​ ∘T 0,0 ​ ?

Solution

To find the image of the point (5,7)(-5, -7) after the transformation R180T0,0R_{180^\circ} \circ T_{0,0}, we need to follow these steps:

  1. Rotation by 180180^\circ about the origin:

    • When a point (x,y)(x, y) is rotated by 180180^\circ around the origin, the transformation results in the point (x,y)(-x, -y).

    So, applying the 180180^\circ rotation to the point (5,7)(-5, -7): (5,7)R180(5,7)(-5, -7) \xrightarrow{R_{180^\circ}} (5, 7)

Thus, the image of the point (5,7)(-5, -7) after the transformation R180T0,0R_{180^\circ} \circ T_{0,0} is (5, 7).

Would you like more details or clarifications on this transformation?

Here are 5 related questions to explore further:

  1. How does the transformation change if we rotate by 9090^\circ instead of 180180^\circ?
  2. What would happen if we applied a translation after the rotation?
  3. How does rotating a point by 180180^\circ affect its distance from the origin?
  4. Can you apply the same transformation to any point on the coordinate plane?
  5. What is the difference between a rotation around the origin and around another point?

Tip: When rotating points, always pay attention to the center of rotation—it determines how the coordinates change!

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Math Problem Analysis

Mathematical Concepts

Coordinate Geometry
Transformations
Rotations

Formulas

Rotation of a point by 180 degrees: (x, y) -> (-x, -y)

Theorems

Rotation Theorem: A point rotated by 180 degrees around the origin results in (-x, -y)

Suitable Grade Level

Grades 8-10