Similar Figures Indirect Measurement and Scale Drawing

the ratio used to enlarge or reduce similar figures

• scale factor

• scale model

• scale drawing

figures with the same shape but not necessarily the same size

• similar

• linear

• circular

The ratio of the length in a drawing/model to the length of the real object.

• Ratio

• Rate

• Scale

The drawing that shows a real object with accurate sizes that are reduced or enlarged by a certain amount.

• Cross Product

• Scale Drawing

• Similar

Figures/shapes that have exactly the same shape, but not the same size. They can be flipped, resized, slide, or turned.

• Similar

• Corresponding Sides

• Cross Products

a factor/number used to multiply a figure or shape.

• Indirect Measurement

• Scale Factor

• Rates

Choose the correct scale factor if NDMP is the original and N'D'M'P'

• 2

• 3

• 1/3

• 1/2

Two figures that have the same shape but not necessarily the same size are _____.

• dilation

• scale drawing

• scale factor

• similar

Are the two triangles Similar?  

• Yes, by the SSS postulate

• Yes, by the SAS postulate

• Yes, by the AA postulate

• No, they are NOT similar 

The length of the sides of two similar triangles are in the ratio of 2:3. If the area of the larger triangle is 45 cm², find the area of the smallest triangle.

• 30 cm²

• 15 cm²

• 10 cm²

• 20 cm²