Scale Factor And Corresponding Parts

Front

What is the scale factor?

Back

The scale factor is a number that describes how much a shape is enlarged or reduced compared to its original size.

Front

What is the scale factor from ΔABC to ΔDEF if the sides of ΔDEF are twice as long as those of ΔABC?

Back

The scale factor is 2.

Front

Identify the corresponding side length in a scaled figure.

Back

The corresponding side length is the side in the original figure that matches a side in the scaled figure.

Front

What is a corresponding angle in similar figures?

Back

A corresponding angle is an angle in one figure that matches an angle in another figure when the figures are similar.

Front

Is Figure B a scaled copy of Figure A if the scale factor is 1/2?

Back

Yes, Figure B is a scaled copy of Figure A because the dimensions are halved.

Front

If the scale factor is 4, how do the areas of the shapes compare?

Back

The area of the larger shape is 16 times greater than the area of the original shape.

Front

What does it mean for two figures to be similar?

Back

Two figures are similar if they have the same shape but different sizes, with corresponding angles equal and corresponding sides in proportion.

Front

How do you find the scale factor between two similar triangles?

Back

Divide the length of a side of the larger triangle by the length of the corresponding side of the smaller triangle.

Front

What is the relationship between corresponding sides in similar figures?

Back

The ratios of the lengths of corresponding sides are equal to the scale factor.

Front

If the scale factor is 1/3, what happens to the dimensions of the original figure?

Back

The dimensions of the original figure are reduced to one-third of their size.