Problem preview
G-CO.2 Warmup M1-037-A03-V01

Represent transformations as functions on points and compare distance/angle-preserving transformations with non-rigid transformations.

Write a coordinate rule for a 90 degree rotation

Problem

Write the coordinate rule for a \(90°\) counterclockwise rotation about the origin.

Big Picture

What this problem is really about

For a quarter-turn, the safest route is to track the coordinate directions themselves. We’ll follow where the positive horizontal and vertical unit vectors move, use those images to rebuild a general point, and check both the turn direction and preserved distance before stating the coordinate rule.

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Four variants of this problem type
Curriculum context
Course
Math I
Standard
G-CO.2
Category
Geometry
Domain
Congruence
Objective
Represent transformations as functions on points and compare distance/angle-preserving transformations with non-rigid transformations.
Problem type
Write a coordinate rule for a 90 degree rotation