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Illustrative Mathematics - Geometry - Mathematics - Unit 2 - Lesson 1

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Last updated 2 months ago
6 Questions
1.

When rectangle ABCD is reflected across line EF, the image is DCBA. How do you know that segment  is congruent to segment DC?

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2.

Triangle FGH is the image of isosceles triangle FEH after a reflection across line HF. Select all the statements that are a result of corresponding parts of congruent triangles being congruent.

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3.

Reflect right triangle ABC across line BC. Classify triangle ACA' according to its side lengths. Explain how you know.

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4.

Triangles FAD and DCE are translations of triangle ABC
Select all the statements that must be true.

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5.

Triangle ABC is congruent to triangles BAD and CEA.
  1. Explain why points D, A, and E are collinear.
  2. Explain why line DE is parallel to line BC.

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6.

  1. Identify a figure that is the result of a rigid transformation of quadrilateral ABCD.
  2. Describe a rigid transformation that would take ABCD to that figure.

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

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