Back to Understand that a two-dimensional figure is congruent to another if the second can be obtained from the first by a sequence of rotations, reflections, and translations — Problem 2 · Task Set 60

8.G.A.2 Tutor Intake -- Congruence Through Sequences of Rigid Motions

This short check helps your tutor see where to start. Work on your own,
without a calculator. Do your best -- the goal is to find what to work
on together, not to grade you.

Grade 8·4 problems·~6 min·Common Core Math - Grade 8·container·8-g-a-2

Work through problems with immediate feedback

Concepts

A student says two figures are congruent because "they look about
the same size and shape." What is the issue with this reasoning?

It relies on visual judgment instead of a verifiable test (a sequence of rigid motions)

There is no issue -- 'looks the same' is the correct definition of congruent

The issue is that congruent figures must always be different sizes

The issue is that congruence only applies to triangles