Pre Algebra Scale and Similar Figures

In similar figures, the lengths of corresponding sides are proportional.

• Always true

• Sometimes true

• Never true

Similar figures have corresponding angles that are congruent.

• Always true

• Sometimes true

• Never true

Are they similar?

• Yes, the angles are congruent and the side lengths are proportional.

• No, the angles are congruent, but the side lengths are not proportional.

• No, the side lengths are proportional, but the angles are not congruent.

• No, the side lengths are not proportional, nor are the angles congruent.

A technique using properties of similar polygons to find distances or lengths that are difficult to measure directly.

• indirect measurement

• estimation

• calculation

• algebra

If one image can be obtained from another by a sequence of transformations AND dilations, then we say the figures are _______.

A transformation that enlarges or reduces a figure by a scale factor.

The ratio of the lengths of two corresponding sides of two similar polygons.

• scale factor

• slope

• dilation

• image

A branch of mathematics that involves expressions with variables.

• Algebra

• Geometry

• Calculus

• Trigonometry

A figure that has been dilated is ____________________________ as its image.

• the same shape and size

• the same shape and a different size

• a different shape and size

• it depends on the problem

The scale factor _________________________________________.

• changes the size of a figure.

• changes the shape of a figure.

• is a rigid motion.

• can only be used on triangles.