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Track Meet Results Board: Straightedge Trials worksheet preview

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Track Meet Results Board: Straightedge Trials

Test translations, reflections, and rotations on a track meet results board using tracing, grid measurements, and straightedge checks.

Grade 8MathInteractive · Printable

Aligned to8.G.A.1.a

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What’s included

  • Single worksheet
  • Auto-graded online
  • 1 Common Core standard
  • Printable answer key
  • 13 questions
  • Classroom-ready

Details

Format
Interactive · Printable
Grade
Grade 8
Subject
Math
Question types
Fill in the blank, Multiple choice, Circle the answer, Short answer, Drawing

About this worksheet

What students practice

  • Students use tracing and grid measurements to check that rigid transformations preserve segment lengths.
  • Students test that translations, reflections, and rotations send straight lines to straight lines.
  • Students use experimental evidence to evaluate proposed changes to a results board.

How to use

Provide tracing paper, a ruler, and a pencil. Have students perform the indicated moves before answering, then compare their evidence with a partner.

Curriculum

Common Core standard covered

8.G.A.1.a

Check by experiment that rotations, reflections, and translations move lines to lines and segments to equal-length segments.

Preview

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Name Date

Track Meet Results Board: Straightedge Trials

Test what happens to lines and segment lengths when board features move.

1. Test the board markers

Each grid interval represents 1 board unit. Use tracing paper to perform the moves. Measure lengths in board units, not inches. A prime mark (′) labels an image point.

1.
Segment AB marks a relay result. Trace it and rotate the tracing 180° about the origin. Draw the complete image segment and label A′ and B′.−5−4−3−2−1123450−5−4−3−2−112345AB
−5−4−3−2−1123450−5−4−3−2−112345
2.
Use your tracing from Question 1. Which observation directly checks that the rotation preserved the segment's length?
  • A. Both endpoints have moved to different quadrants.
  • B. Both endpoint labels now have prime marks.
  • C. The image lies on a different part of the board.
  • D. The tracing covers the image from endpoint to endpoint.
3.
A divider below the sprint results has endpoints C(−4, 2) and D(3, 2). Reflect the divider across the x-axis on tracing paper. Compare the original and reflected lengths.−5−4−3−2−1123450−5−4−3−2−112345CD

Original length:   units; reflected length:   units.

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