Dilations and Measurements | 8th Grade Math – Geometry
Perfect for students in traditional classrooms, homeschool families, and anyone who needs a clear math explanation!
Learn how to use scale factors to find side lengths, perimeters, and areas after dilations in this 8th grade geometry lesson.
✏️ Topics covered:
• Finding new side lengths after a dilation: multiply original side length by scale factor k
• All sides of the image are proportional to the original by the scale factor
• Perimeter after dilation: new perimeter = original perimeter × k
• Area after dilation: new area = original area × k²
• Understanding WHY area scales by k²: both dimensions are multiplied by k, so area = k × k = k²
• Calculating the scale factor from given original and image measurements
• Working backward: finding original measurements from image measurements and scale factor
• Connecting dilation measurements to the properties of similar figures
• Comparing the scale factor for length vs. the scale factor for area
• Real-world measurement problems: scale models, blueprints, and photography
📚 Mrs.D Math helps students master math one lesson at a time.
#Dilations #ScaleFactor #SimilarFigures #Area #Perimeter #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 8.10D
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