Problem preview
G-CO.3 Warmup M1-038-A02-V01

Describe rotations and reflections that carry rectangles, parallelograms, trapezoids, or regular polygons onto themselves.

Identify rotational symmetry angles

Problem

Identify the rotations that carry a non-square rectangle onto itself.

Big Picture

What this problem is really about

Rotational symmetry means the entire outline returns to the same occupied positions, not merely that the figure remains congruent somewhere else. We’ll include the identity case, track what happens to opposite vertices under a half-turn, and test quarter-turns by asking whether long and short sides would have to exchange roles.

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Four variants of this problem type
Curriculum context
Course
Math I
Standard
G-CO.3
Category
Geometry
Domain
Congruence
Objective
Describe rotations and reflections that carry rectangles, parallelograms, trapezoids, or regular polygons onto themselves.
Problem type
Identify rotational symmetry angles