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GeoGebraGeoGebra Classroom

Polygon Scaling

Scale the triangle below with s being the scale factor.

Think About It: Scaled Triangle Areas

If points and are both at the mark, then the area of the blue triangle is . What if the triangle is enlarged with a scale factor of ? Answer with the area of the new, scaled triangle.

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  • A
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  • D
Check my answer (3)

Enlarge or reduce the square below and take note of the effects on the area.

Think About It: General Form of Scaled Square Areas

If is multiplied by a number , what is the area of the new square?

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  • B
  • C
  • D
  • E
Check my answer (3)

Applications

How can scaling and similarity help in the real world? You can write your notes, ideas, or explanations below.