Similar Shapes

Have equal angles and proportional sides

Equal Angles

Triangles have interior angles that add up to 180 degress

​Remember

Divide the corresponding (matching) sides

​What is the rule for the ray?

Proportional Sides

All the sides use the same rule

​Similar if...

Similarity

Multiply or divide by the scale factor to find the missing length

​Find the missing side

Divide the known corresponding lengths to find the scale factor
Tips: make sure you are comparing matching sides
Double check if you should be multiplying or dividing

​First, identify the rule

Finding Missing Side Lengths