Math Problem Statement

Diketahui segitiga ABC dengan titik A(-1, 3), B(5, -3), dan C(2, 4) ditranslasi oleh T(-3, -2), kemudian dilanjutkan rotasi sejauh 90° searah jarum jam. Bayangan ketiga titik tersebut adalah ...

Solution

The problem describes a transformation of triangle ABCABC through two steps: a translation followed by a rotation. Let's break down the steps systematically.

Given:

  • A(1,3),B(5,3),C(2,4)A(-1, 3), B(5, -3), C(2, 4)
  • Translation by T(3,2)T\left(-3, -2\right)
  • Rotation of 90° clockwise about the origin.

Step 1: Translation

To apply the translation T(3,2)T(-3, -2), we add (3,2)(-3, -2) to each point.

For point A(1,3)A(-1, 3): A=(1+(3),3+(2))=(4,1)A' = (-1 + (-3), 3 + (-2)) = (-4, 1)

For point B(5,3)B(5, -3): B=(5+(3),3+(2))=(2,5)B' = (5 + (-3), -3 + (-2)) = (2, -5)

For point C(2,4)C(2, 4): C=(2+(3),4+(2))=(1,2)C' = (2 + (-3), 4 + (-2)) = (-1, 2)

Step 2: Rotation by 90° Clockwise

To rotate a point (x,y)(x, y) by 90° clockwise around the origin, the formula is: (x,y)=(y,x)(x', y') = (y, -x)

Applying this to the translated points:

For A(4,1)A'(-4, 1): A=(1,4)A'' = (1, 4)

For B(2,5)B'(2, -5): B=(5,2)B'' = (-5, -2)

For C(1,2)C'(-1, 2): C=(2,1)C'' = (2, 1)

Final coordinates:

  • A(1,4)A''(1, 4)
  • B(5,2)B''(-5, -2)
  • C(2,1)C''(2, 1)

Thus, the correct answer is D: A(1,4),B(5,2),C(2,1)A''(1,4), B''(-5,-2), C''(2,1).

Would you like further details on any of the steps? Here are 5 related questions for deeper understanding:

  1. How would the transformation change if the rotation was counterclockwise?
  2. What is the general formula for a 90° clockwise rotation around any point other than the origin?
  3. Can you calculate the distance between the original and translated points?
  4. How does a reflection differ from a rotation in terms of transformation?
  5. What is the composition of multiple transformations in geometry?

Tip: When rotating points, always visualize or draw the axes to avoid mistakes!

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Transformation
Translation
Rotation
Coordinate Geometry

Formulas

Translation formula: (x', y') = (x + a, y + b)
Rotation by 90° clockwise: (x', y') = (y, -x)

Theorems

Geometric transformations in the Cartesian plane

Suitable Grade Level

Grades 10-12