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Homework 3C1 • Read section 3-6. • Define: Tessellation. • Copy the Yellow box on page 161 into your “Notes” book. • Finish: Worksheet 3-5 Drill 3C1 1. Solve for x X+2 = 7 10 7 Drill 3C1 2. Copy rectangle RECT and point P. Rotate the rectangle 90° counterclockwise about P. Homework 3C1 • Read section 3-6. • Define: Tessellation. • Copy the Yellow box on page 161 into your “Notes” book. • Finish: Worksheet 3-5 Drill 3C1 X+2 = 7 1. Solve for x 10 7 7(X+2) = 7(10) 7X+14 =70 S14 7X = 56 D7 X=8 Drill 3C1 2. Copy rectangle RECT and point P. Rotate the rectangle 90° counterclockwise about P. C’ T’ P E’ R’ Symmetry Objective: The student will find and locate the line of and point of symmetry of images. Vocabulary: Symmetry Symmetry - a figure has a point or . line about which it maps onto itself. Types of Symmetry – Rotational Symmetry & Line Symmetry Rotational Symmetry – a figure rotates 1800 or less about a fixed point to map onto itself. Line Symmetry- a figure reflects over a line to map onto itself. Example of Symmetry A’B’C’D’ is the reflected image of ABCD over the line l . D’ C’ This is the A B line of l reflection. A’ B’ D C Notice that the A’B’C’D’ is ABCD is the orientation has the copy or reversed original or preimage. image. Example of Symmetry H’G’K’L’ is the image of HGKL rotated at 1800 about P. KH’ J G’ GKJH is the original or preimage. P Notice that the G J’ H K’ orientation has not reversed G’K’J’H’ is the P is the point copy or image. of rotation. Please work all problems on worksheet 3-5 of your packet. Closing Problems 1. Which figure has both line and rotational symmetry? F. G. J. H. Closing Problems 2. How many lines of symmetry does the figure below have? Pass in your closer answers. Pack up and be ready to leave when the tone sounds. DO NOT LEAVE YOUR SEAT UNTIL THE TONE!
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