If ΔGFE~ΔCBE, find the value of x. 

The scale factor from figure A to figure B is 4.  How many times larger is the perimeter of B than the perimeter of A?

The scale factor from figure A to figure B is 4.  How many times larger is the area of B than the area of A?

Are these figures similar?

To find the height of a very tall pine tree, you place a mirror on the ground and stand where you can see the top of the pine tree.  How tall is the tree?

The pair of figures is similar. Find the missing side.

Solve for X.

Using a proportion, find the height of the tree.

Tell whether the two figures are similar. Explain your reasoning. (Hint: are they proportional?)

Sides in similar figures must be proportional.