Stretching and Shrinking - So... how are we doing???

Front

What is the scale factor from ΔDEF to ΔABC?

Back

1/2

Front

If the scale factor is greater than one, the new figure will be

Back

bigger

Front

The triangles below are similar. What angle in triangle DEF corresponds with angle A in triangle ABC?

Back

D

Front

What does perimeter mean?

Back

The distance around the shape.

Front

The pair of figures is similar. Find the missing side: x = ?

Back

x = 3

Front

What is a scale factor?

Back

A number that scales, or multiplies, a quantity.

Front

If a shape is enlarged by a scale factor of 3, what happens to its dimensions?

Back

All dimensions are multiplied by 3.

Front

What does it mean for two shapes to be similar?

Back

They have the same shape but may differ in size.

Front

How do you find the perimeter of a rectangle?

Back

Add the lengths of all four sides.

Front

What is the relationship between corresponding angles in similar triangles?

Back

They are equal.