Math Problem Statement
What is the image of the point left parenthesis, minus, 7, comma, minus, 8, right parenthesis(−7,−8) after a rotation of 270, degrees270∘ counterclockwise about the origin?
Solution
To find the image of the point after a rotation of 270° counterclockwise about the origin, we can use the standard formula for rotating a point by an angle around the origin. The formulas for rotations are:
- A 90° counterclockwise rotation:
- A 180° counterclockwise rotation:
- A 270° counterclockwise rotation:
For a 270° counterclockwise rotation, we apply the formula .
Given the point :
Using the formula for a 270° counterclockwise rotation: So the new coordinates will be:
Therefore, the image of the point after a 270° counterclockwise rotation about the origin is .
Would you like further details or clarifications? Here are some related questions you might find interesting:
- How do the formulas for rotation change for other angles like 90° or 180°?
- What would the point become after a 270° counterclockwise rotation?
- How can we verify the result of a rotation using the distance formula?
- What is the geometric significance of a 270° rotation in terms of the point's path?
- How do you rotate a point by any arbitrary angle, not just multiples of 90°?
Tip: Always remember that counterclockwise rotations are positive, while clockwise rotations are negative!
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Math Problem Analysis
Mathematical Concepts
Coordinate Geometry
Rotations
Formulas
(x, y) → (-y, x) for 90° counterclockwise rotation
(x, y) → (-x, -y) for 180° counterclockwise rotation
(x, y) → (y, -x) for 270° counterclockwise rotation
Theorems
Rotation of points around the origin
Suitable Grade Level
Grades 8-10
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