Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Chapter 7 Similarity

Unit 1 Geometry Chapter 7 Similarity

Vocabulary WordDefinition
Proportion An equation stating that two ratios are equal
Extremes The outer values of a:b = c:d. (a and d are extremes)
Means The inner values of the proportion a:b=c:d. (b and c are the means)
Cross products The product of the means and the extremes. (ad = bc)
Ratio The comparison of two numbers using division
Similar Figures Figures that have the same shape but not necessarily the same size
Similar Polygons Corresponding angles are congruent and corresponding side lengths are proportional
Similarity Ratio The ratio of the lengths of the corresponding sides of two similar polygons
Indirect Measurement Any method that uses formulas, similar figures, or proportions to measure an object
Scale Drawing Representing an object as smaller or larger than its original size
Scale The ratio of any length in the drawing to the corresponding actual length
Dilation A transformation that changes the size of a figure but not its shape
Scale Factor How much a figure is enlarged or reduced
Created by: rgilpatric