Algebraic Representations of Dilations | 8th Grade Math
Perfect for students in traditional classrooms, homeschool families, and anyone who needs a clear math explanation!
Learn how to write and apply algebraic rules for dilations on the coordinate plane in this 8th grade geometry lesson.
✏️ Topics covered:
• Dilation rule centered at the origin: (x, y) → (kx, ky)
• Applying the dilation rule to each vertex of a figure
• Plotting the original and dilated image on the same coordinate plane
• Using k ≻ 1 to enlarge (e.g., multiply all coordinates by 2 for scale factor 2)
• Using 0 ≺ k ≺ 1 to reduce (e.g., multiply all coordinates by ½ for scale factor ½)
• Finding the scale factor from a pre-image and its image: k = image coordinate ÷ original coordinate
• Verifying the dilation by checking that all side length ratios equal the scale factor
• Finding original coordinates from the image and scale factor
• Writing the algebraic rule that maps a given pre-image to its dilation image
📚 Mrs.D Math helps students master math one lesson at a time.
#DilationRules #Dilations #Transformations #ScaleFactor #8thGradeMath #MrsDMath #HomeschoolMath #Geometry
You can shop for the worksheet that follows along with this video in my Teachers Pay Teachers store.
https://www.teacherspayteachers.com/P...
TEKS 8.3C
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