Proportions
Scale Factor
Similar Figures
Missing sides of similar figures
miscellaneous
200

What does it mean for two shapes to be similar?

Same shape, different size

200

The following figures are similar.  Find the missing value.  


What is x = 11?

200
The three ways to prove triangles similar.

What is AA~, SSS~, SAS~?

400

Find the scale factor of the similar figures (from left to right)


What is 2/3?

400

For figures to be similar, what has to be true about the corresponding angles?

Corresponding angles have to be congruent

400

The following figures are similar.  Find the missing value. 


What is x = 3.5?

400

Are the following triangles similar?  If so, what is the shortcut?


What is SSS~?

600

Solve the following proportion:



What is x = 2?

600

Find the scale factor of the two similar figures (from left to right)


What is 1/3?

600

For figures to be similar, what has to be true about the corresponding sides?

Corresponding sides have to be proportional.  

600

Are the following triangles similar?  If so, why?


No, the sides are not proportional.  

800

Solve the following proportion:  


What is x = 8.4 or 42/5?

800

Find the scale factor of the similar figures (from left to right)


What is 3/4?

800

Are these figures similar?


Yes, the corresponding angles are congruent and the sides are proportional

800

The following figures are similar.  Find the missing value.



What is x = 50 feet?

800

Are the following triangles similar?  


What is AA~?

1000

Solve the following proportion:



What is x = 22?

1000

Find the scale factor of the two similar figures (from smallest to largest)


What is 4/11?

1000

Are these figures similar?



No, the corresponding angles are congruent, but the sides are not proportional

1000

A tree casts a shadow 60 feet long.  At the same time, a nearby 8 foot post casts a 12 foot shadow.  How tall is the tree?

The tree is 40 feet tall.  

1000

Are the following triangles similar?  If so, why?


What is SAS~?