Lesson plan

Reflect an image by using a coordinate plane

teaches Common Core State Standards CCSS.Math.Content.8.G.A.1 http://corestandards.org/Math/Content/8/G/A/1
teaches Common Core State Standards CCSS.Math.Content.8.G.A.1a http://corestandards.org/Math/Content/8/G/A/1/a
teaches Common Core State Standards CCSS.Math.Content.8.G.A.1b http://corestandards.org/Math/Content/8/G/A/1/b
teaches Common Core State Standards CCSS.Math.Content.8.G.A.1c http://corestandards.org/Math/Content/8/G/A/1/c

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Big Ideas: Numbers, expressions, and measures (for example lines and angles) can be compared by their relative values. Two- and three-dimensional objects with or without curved surfaces can be described, classified, and analyzed by their attributes (for example the size of their angles and sides). Objects in space can be oriented in an infinite number of ways, and an object’s location in space can be described quantitatively. Objects in space can be transformed in an infinite number of ways, and those transformations can be described and analyzed mathematically. Students will demonstrate their understanding of reflections by determining the coordinates of the reflected image given the original coordinates and the reflection. Students will also be asked to determine the reflection given the coordinates of the pre- and post-images. Students will be able to explain why the reflected image of a figure is congruent to the pre-image by demonstrating that the side's lengths and angle measurements of the pre-image and image are congruent. Vocabulary: Congruency, Similarity, Transformation, Translation, Reflection, Rotation, Parallel, Image, Prime, Notations, Order pair, notation, Pre-Image, Angle, Line, Parallel Line Special Materials: Graph Paper Rulers Protractor Geo boards Patty Paper Geometry Software