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.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

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.
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


Scalene No equal sides
Isosceles Two equal sides
Equilateral Three equal sides
Acute All angles less than 90 degees
Obtuse One angle larger than 90 degrees
Right One angle equal to 90 degrees
CPCTC (Corresponding Parts of Congruent Triangles are Congruent) If triangles are proven to be congruent, then you can say that the corresponding parts of those triangles are congruent.
Congruent Same size and same shape
Similar Same shape but different size
Hypotenuse The side across from the 90 degree angle in a right triangle.
Sine opposite over hypotenuse
Cosine adjacent over hypotenuse
Tangent oppostie over adjacent
Angle of elevation Angle from the ground (bottom) and going up. Looking up
Angle of depression Angle from above (top) and going down. Looking down
Created by: MsJacksonMath