Back to Use rigid motions for congruence — Problem 3 · Task Set 6

Exercises: Use Rigid Motions to Define and Determine Congruence

Work through each section in order. For problems that ask you to find a rigid motion, verify your answer by checking every vertex.

Grade 9·20 problems·~30 min·Common Core Math - HS Geometry·standard·hsg-co-b-6

Work through problems with immediate feedback

Fluency Practice

Apply rigid motions and the definition of congruence to answer each problem.

$Coordinate plane showing triangle ABC with vertices A(2,1), B(4,1), C(2,4) in Quadrant I and a counterclockwise rotation arrow at the origin.$

Triangle $ABC$ has vertices $A(2, 1)$ , $B(4, 1)$ , and $C(2, 4)$ .
It is rotated $90^\circ$ counterclockwise about the origin. Which quadrant
contains the image vertex $A'$ ?

Quadrant I

Quadrant II

Quadrant III

Quadrant IV