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Unit 1 - Lesson 7 - Grade 8: Illustrative Mathematics

By Formative Library
Last updated 2 months ago
12 Questions
Note from the author:
Grade 8 Unit 1
Lesson 7: No Bending or Stretching
CC BY 2021 Illustrative Mathematics®
Grade 8 Unit 1
Lesson 7: No Bending or Stretching
CC BY 2021 Illustrative Mathematics®
Lesson: No Bending or Stretching

Measuring Segments (Warm Up)

For each question, the unit is represented by the large tick marks with whole numbers.
1.

Find the length of this segment to the nearest 1/8 of a unit.

2.

Find the length of this segment to the nearest 0.1 of a unit.

3.

Estimate the length of this segment to the nearest 1/8 of a unit.

4.

Estimate the length of the segment in the prior question to the nearest 0.1 of a unit.

Sides and Angles

5.

Translate Polygon A so point P goes to point Q. In the image, write the length of each side, in grid units, next to the side.

6.

Rotate Triangle B 90 degrees clockwise using R as the center of rotation. In the image, write the measure of each angle in its interior.

Reflect Pentagon C across line ℓ.
7.

In the image, write the length of each side, in grid units, next to the side. You may need to make your own ruler with tracing paper or a blank index card.

8.

In the image, write the measure of each angle in the interior.

Which One?

Here is a grid showing triangle ABC and two other triangles.
You can use a rigid transformation to take triangle ABC to one of the other triangles.
9.

Which one? Explain how you know.

10.

Describe a rigid transformation that takes ABC to the triangle you selected.

Cool Down: Translated Trapezoid

Translated Trapezoid

Trapezoid A' B' C' D' is the image of trapezoid ABCD under a rigid transformation.
11.

Label all vertices on trapezoid A' B' C' D'

12.

On both figures, label all known side lengths and angle measures.