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11–10Check Your Progress Triangle XYZ has vertices X(2, 4),Y(0, 7), and Z(−2, 2). Graph the figure and its image after acounterclockwise rotation of 90° around the origin. Then findthe coordinates of the rotated image.yOxBUILD YOUR VOCABULARY (page 262)A figure has rotational symmetry if the figure can berotated about its center by a certain number of degrees andstill look like the original.The angle of rotation is the degree measure of the anglethrough which the figure is rotated.HOMEWORKASSIGNMENTPage(s):Exercises:EXAMPLE Determine Rotational SymmetryDetermine whether the letter has rotational symmetry.Write yes or no. If yes, name the angle of rotation.ASince the letter cannot be rotated and stilllook like it does in its original position, theletterhave rotational symmetry.Check Your Progress Determine whether the letter hasrotational symmetry. Write yes or no. If yes, name the angle ofrotation.HCopyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.284 Math Connects, Course 1