Log In

My Passes

Sign Up
Learning Guides
Teacher Resources
Test Prep
College Readiness
Schools & Districts
All of Shmoop
Literature
Bible
Poetry
Shakespeare
Mythology
Bestsellers
Dr. Seuss
PreAlgebra
Algebra
Algebra II
Geometry
Biology
US History
Flashcards
DMV
Careers
SAT
ACT
AP Exams
En Español
Essay Lab
Videos
Literary Critics
Shmoop Shtuff
Cite This Page
To Go
Similar Triangles
Home
Geometry
Similar Triangles
Exercises
Intro
Topics
Examples
Exercises
Terms
Best of the Web
Quizzes
Handouts
Table of Contents
ADVERTISEMENT
Topics Exercises
Ratio
Beep, beep, back the truck up. Let's quickly remember that a ratio is a comparison of two related quantities found by dividing one quantity by another. To write a ratio, you can either wr...
Proportion
A proportion is a statement of the equality of two ratios. Unlike the amateur portion who tells us that he kept that status just so he could compete in the portion Olympics, a proportion...
Triangle Proportionality Theorem
Similar triangles can be located any number of places, including one inside the other. And if you're working with a big problem, there may be a third similar triangle inside of the first two. And t...
Triangle Midsegment Theorem
The Triangle Midsegment Theorem. TMT. Sounds like fun, yes? While not nearly as scandalous as TMZ, the TMT shares plenty of juicy morsels of gossip about the lengths of various line segme...
Angles and Sides
Are you tired of hearing that similar triangles have congruent angles and proportional sides? We only keep saying it because it's important. And true. And important.If we know that two triangles ha...
Proving Triangle Similarity
Imagine you've been caught up in a twister that deposits you and your little dog in the middle of a strange new land. In order to get home, you must prove that two triangles are similar. How will y...
Dilation
Ack!Hey, chill. Take a deep breath and look at the bigger picture, and you'll see that the monsters of geometry aren't quite that scary.The world is full of plenty of transformations, processes tha...
Similarity in Other Polygons
Triangles, triangles, triangles! Why do they get all the attention?It's so hard being the younger sibling of the strongest and most stable shape there is. How about some love for the rest...
Need help with College?