Illustrative Mathematics - Geometry - Mathematics - Unit 1 - Lesson 14

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Last updated about 1 year ago

7 Questions

Draw the image of quadrilateral ABCD when rotated 120° counterclockwise around the point D.

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There is an equilateral triangle, ABC, inscribed in a circle with center D. What is the smallest angle you can rotate triangle ABC around D so that the image of A is B?

60°

120°

180°

90°

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Which segment is the image of AB when rotated 90° counterclockwise around point P?

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The semaphore alphabet is a way to use flags to signal messages. Here's how to signal the letter Q. Describe a transformation that would take the right hand flag to the left hand flag.

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Here are 2 polygons:

Select all sequences of translations, rotations, and reflections below that would take polygon P to polygon Q.

Rotate 60° counterclockwise around point A and then reflect over the line FA.

Reflect over line BA and then translate by directed line segment BA.

Reflect over the line BA and then rotate 60° counterclockwise around point A.

Translate so that A is taken to J. Then reflect over line BA.

Rotate 180° around point A.

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Draw the image of figure ABC when translated by directed line segment u. Label the image of A as A', the image of B as B', and the image of C as C'.

Explain why the line containing AB is parallel to the line containing A'B'.

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There is a sequence of rigid transformations that takes A to A', B to B', and C to C'. The same sequence takes D to D'. Draw and label D':

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This lesson is from Illustrative Mathematics. Geometry, Unit 1, Lesson 14. Internet. Available from https://curriculum.illustrativemathematics.org/HS/teachers/2/1/14/index.html ; accessed 29/July/2021.

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