Similar Figures & Scale Drawings

Front

What are similar figures?

Back

Two figures that have the same shape but may differ in size.

Front

What does it mean for angles in similar figures?

Back

All corresponding angles in similar figures are congruent.

Front

What is a scale drawing?

Back

A drawing that represents an object or place with accurate proportions, using a specific ratio.

Front

If the scale of a drawing is 1 cm : 4 m, how would you convert real measurements to the drawing?

Back

Multiply the real measurement by the scale factor.

Front

What is the scale factor in the drawing of a town library where 5 cm represents 2 m?

Back

The scale factor is 5 cm : 2 m.

Front

How do you find the width of a parking lot in a scale drawing if the real width is 34 m?

Back

Use the scale to set up a proportion: 5 cm/2 m = x cm/34 m.

Front

If a model of a house is built at a scale of 5 in : 25 ft, what is the scale factor?

Back

The scale factor is 1 in : 5 ft.

Front

How wide is a window in a model if it is 1.5 in wide and the scale is 5 in : 25 ft?

Back

The actual width of the window is 7.5 ft.

Front

What is the relationship between similar figures and their corresponding sides?

Back

The ratios of the lengths of corresponding sides are equal.

Front

If two triangles are similar, what can be said about their perimeters?

Back

The ratio of their perimeters is equal to the ratio of their corresponding sides.