Scaled Copies

Front

What is a scaled copy?

Back

A scaled copy is a figure that is similar to the original figure but is a different size, created by multiplying all dimensions of the original by the same scale factor.

Front

What is the scale factor?

Back

The scale factor is the number you multiply the original shape by in order to get the scale copy.

Front

How do you find the area of a rectangle?

Back

To find the area of a rectangle, multiply its length by its width.

Front

If a rectangle has a length of 6 cm and a width of 4 cm, what is its area?

Back

The area is 24 sq cm (6 cm x 4 cm).

Front

Is Figure B a scaled copy of Figure A if all corresponding lengths are in the same ratio?

Back

Yes, if all corresponding lengths are in the same ratio, then Figure B is a scaled copy of Figure A.

Front

What happens to the area of a shape when the scale factor is 2?

Back

The area of the shape increases by a factor of 4 (2 squared) because area is a two-dimensional measurement.

Front

What is the relationship between the scale factor and the dimensions of a scaled copy?

Back

The dimensions of a scaled copy are found by multiplying the original dimensions by the scale factor.

Front

If the scale factor is 1/2, what happens to the size of the original figure?

Back

The original figure is reduced to half its size.

Front

What is the formula for the area of a rectangle?

Back

Area = length x width.

Front

If a triangle has a base of 10 cm and a height of 5 cm, what is its area?

Back

The area is 25 sq cm (1/2 x base x height = 1/2 x 10 cm x 5 cm).