247SimpleTests
ASVAB · Mental Rotation

If a shape in an answer choice is flipped into a mirror image (not just rotated), what does that mean for a fitting-parts problem?

Reviewed by Jordan Morley, Editorial Lead at 247SimpleTests. Written by the 247SimpleTests Editorial Team from the official source material cited on every question.

Correct answer

A mirror image is generally a different (incorrect) piece unless flipping is allowed, because rotation alone cannot turn a shape into its mirror image

  1. A Mirror images are always correct
  2. B Flipping changes the size
  3. C A mirror image is generally a different (incorrect) piece unless flipping is allowed, because rotation alone cannot turn a shape into its mirror image
  4. D It is still correct

Why this is the answer

There is an important difference between rotating a shape and flipping it into a mirror image. Rotation turns a shape in place without changing which way it 'faces,' while flipping (reflection) produces a mirror image. For most Assembling Objects fitting problems, a piece shown as a mirror image of the original is a different, incorrect piece — you cannot get a mirror image by rotation alone (think of a left hand versus a right hand). So an answer that requires flipping a piece, when only rotation is allowed, should be eliminated. Recognizing mirror images versus rotations is a key visualization skill on this subtest.
Source: ASVAB Assembling Objects, Rotation vs Reflection

Practice more questions

This question is from our ASVAB Practice Tests practice test. Take the full practice test to test your knowledge across all Mental Rotation and other topics.

Take the Assembling Objects practice test →

About this topic: Mental Rotation

Mental rotation is the core skill of Assembling Objects: recognising a shape after it has been turned but not flipped. Answer choices that are mirror images are the standard trap — a rotated shape is never its own mirror image unless it is symmetrical. This is one of 13 Assembling Objects questions on mental rotation, each with a full explanation on a single study page.

New to this exam? Our ASVAB exam guide explains the format, scoring, and how to prepare.

Related questions

Mental Rotation

What is mental rotation, and why is it useful for the Assembling Objects subtest?

 Mental Rotation

If a shape is rotated 90 degrees clockwise, where does its top edge end up?

 Mental Rotation

If a shape has rotational symmetry (looks identical after rotation), how does this affect AO questions?

 Mental Rotation

A flat cross-shaped net (a shape that folds into a cube) has specific symbols on different faces. When assembled, which faces will be opposite each other?

Recommended study materials

Study guide

ASVAB Total Prep (Kaplan)

Kaplan's complete ASVAB guide with 1,000+ practice questions, 6 full-length tests, and AFQT focus.

Check Price → Study guide

Barron's ASVAB with Online Tests 12th Ed.

Comprehensive ASVAB review for all nine subtests with full-length practice exams and online tools.

Check Price → Study guide

ASVAB for Dummies 4th Ed. (Wiley)

Accessible, thorough ASVAB prep covering all subtests with tips for boosting your AFQT score.

Check Price →

As an Amazon Associate, CJ Affiliate, and AWIN publisher we earn from qualifying purchases. Links above are affiliate links. Full disclosure →