Practiquemos transformaciones punto por punto (Optional)
Matemáticas integradas 1
18.1
Warm-up
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Obstáculos
Standards Alignment
Building On
Addressing
Building Toward
HSG-CO.A.5
Given a geometric figure and a rotation, reflection, or translation, draw the transformed figure using, e.g., graph paper, tracing paper, or geometry software. Specify a sequence of transformations that will carry a given figure onto another.
to see where instructional routines fit in your journey.
Materials
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Activity Narrative
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Launch
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Activity
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Student Task Statement
Describe las transformaciones necesarias para salir del laberinto.
Student Response
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Building on Student Thinking
Activity Synthesis
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18.2
Activity
0 mins
Carrera de obstáculos
Instructional Routines
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18.3
Activity
0 mins
Punto por punto
Instructional Routines
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to see where instructional routines fit in your journey.
Student Lesson Summary
A veces es fácil descubrir una transformación que lleve todos los puntos de una figura directamente a todos los puntos de su imagen. En este diagrama, parece que hay una rotación de 90 grados que lleva la figura a la figura . Sin embargo, no es obvio cómo saber dónde está el centro de rotación.
En cambio, podemos describir la transformación en dos pasos. Primero, trasladar la figura usando el segmento de recta dirigido . Luego, rotar la imagen de en el sentido de las manecillas del reloj usando el ángulo y el centro . Parece ser una rotación de 90 grados, pero no estamos seguros. Si usamos los puntos marcados para definir el ángulo de rotación en vez de usar la medida del ángulo, podemos describir la rotación con exactitud. De esta manera, emparejamos puntos uno a la vez hasta llevar toda la figura a su imagen. Este método funciona siempre, incluso cuando es difícil identificar una transformación en un solo paso de una figura a otra.
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Materials
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Activity Narrative
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Launch
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Activity
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Student Task Statement
Observa los dos diagramas. En cada caso, encuentra una secuencia de traslaciones y rotaciones que lleve la figura a su imagen, asegurándote de que, si se hiciera físicamente, la figura no toque los obstáculos ni salga del diagrama. Verifica que tu secuencia es correcta dibujando la imagen luego de cada paso.
Lleva a .
Lleva a .
Activity Synthesis
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Materials
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Activity Narrative
None
Launch
None
Activity
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Student Task Statement
En cada caso, describe una secuencia de traslaciones, rotaciones y reflexiones que lleve el paralelogramo al paralelogramo .
Activity Synthesis
Standards Alignment
Building On
Addressing
HSG-CO.A.2
Represent transformations in the plane using, e.g., transparencies and geometry software; describe transformations as functions that take points in the plane as inputs and give other points as outputs. Compare transformations that preserve distance and angle to those that do not (e.g., translation versus horizontal stretch).
Given a geometric figure and a rotation, reflection, or translation, draw the transformed figure using, e.g., graph paper, tracing paper, or geometry software. Specify a sequence of transformations that will carry a given figure onto another.
Understand that a two-dimensional figure is congruent to another if the second can be obtained from the first by a sequence of rotations, reflections, and translations; given two congruent figures, describe a sequence that exhibits the congruence between them.
Represent transformations in the plane using, e.g., transparencies and geometry software; describe transformations as functions that take points in the plane as inputs and give other points as outputs. Compare transformations that preserve distance and angle to those that do not (e.g., translation versus horizontal stretch).
Given a geometric figure and a rotation, reflection, or translation, draw the transformed figure using, e.g., graph paper, tracing paper, or geometry software. Specify a sequence of transformations that will carry a given figure onto another.